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Joel is the founder of the Photo Ark, a groundbreaking effort to document species before they disappear—and to get people to care while there’s still time.

Explore the Photo Ark

Search the 36,793-picture Photo Ark for an animal or species. Scroll down to see every species in the Ark … if you’ve got all day.

  • 11,177 species in Photo Ark as of today
    Explore the Photo Ark Search the [photoark_count]-picture Photo Ark for an animal or species.
  • 25 years to document every species in human care
  • Photo: A female spot-breasted oriole (Icterus pectoralis) from a private collection in St. Augustine, Florida.
  • Photo: Iberian barbel or Barbo-do-Norte (Luciobarbus bocagei) at the Environmental Education Center of the Ribeiras de Gaia.
  • Picture of a tenrec (Echinops telfairi) at the Lincoln Children's Zoo in Lincoln, Nebraska.
  • A ringed map turtle, Graptemys oculifera, at the National Mississippi River Museum and Aquarium in Dubuque, IA. This species is listed as endangered (IUCN) and federally threatened.
  • Photo: A Western Javan langur (Trachypithecus auratus mauritius) at Taman Safari in Bogor, West Java, Indonesia.
  • Mallard (Anas platyrhynchos) ducklings.
  • Picture of a rock mamushi or Amur viper (Gloydius saxatilis) at the St. Louis Zoo.
  • Picture of an Arctic fox (Vulpes lagopus) named Todd, at the Great Bend Brit Spaugh Zoo in Great Bend, Kansas.
  • Photo: A common house cricket (Acheta domestica).
  • Photo: A Malaysan water monitor (Varanus salvator) at the Rolling Hills Wildlife Adventure.
  • Photo: A sun beam snake (Xenopeltis unicolor) in Jakarta, Indonesia in the care of PT. Alam Nusantara Jayatama.
  • Picture of an endangered Malagasy rainbow frog (Scaphiophryne gottlebei) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.
  • Photo: A common snook (Centropomus undecimalis) at the Conservancy of Southwest Florida.
  • Picture of a white-crowned parrot (Pionus senilis) at the Lowry Park Zoo in Tampa, Florida.
  • Photo: White sucker (Catostomus commersonii) at the Minnesota Department of Natural Resources Center for Aquatic Mollusk Programs.
  • Photo: An Madagascar girdled lizard, Zonosaurus madagascariensis, at Tsimbazaza Zoo.
  • A brown recluse spider (Loxosceles reclusa) at the Audubon Zoo in New Orleans.
  • A common Myna or Indian Myna, (Acridotheres tristis tristis) from a private collection.
  • Rough-scaled sand boa (Eryx conicus) at the Tulsa Zoo.
  • Photo: A cinnamon tarantula (Crassicrus lamanai) from a private collection.
  • A Red tegu lizard (Tupinambis rufescens) at Parco Natura Viva, in Bussolengo, Italy.
  • A Sabah stick insect (Aretaon asperrimus) at the Rolling Hills Wildlife Adventure.
  • Picture of a critically endangered Malaysian river painted terrapin (Batagur borneoensis) at Omaha's Henry Doorly Zoo.
  • Photo: King Worms beetle (Zophobas morio) at the Singapore Zoo.
  • A honeybee (Apis mellifera) photographed in a studio in Lincoln, NE.
  • Photo: An endangered cotton-top tamarin (Saguinus oedipus) at the Miller Park Zoo.
  • Photo: Scottish wildcats (Felis silvestris grampia) at Wildcat Haven.
  • A federally endangered Karner blue butterfly larva, Lycaeides melissa samuelis.
  • Photo: A male lineated woodpecker (Dryocopus lineatus) at the National Aviary of Colombia.
  • Picture of a Macklot's python (Liasis mackloti) at the Columbus Zoo.
  • Picture of a Boyd's forest dragon (Hypsilurus boydii) at Wild Life Sydney Zoo.
  • Photo: A Palawan treeshrew (Tupaia palawanensis) at the Avilon Zoo.
  • Coturnix quail (Coturnix coturnix japonicus) at the Sutton Avian Research Center.
  • Picture of a bristletooth Tomini tang surgeonfish (Ctenochaetus tominiensis) at Pure Aquariums.
  • Picture of aBlack-sided hawkfish (Paracirrhites forsteri) at Omaha's Henry Doorly Zoo and Aquarium.
  • Picture of a male ringed teal (Callonetta leucophrys) at the Gladys Porter Zoo in Brownsville, Texas.
  • A black wood turtle (Rhinoclemmys funerea) at the San Antonio Zoo, San Antonio, Texas. (IUCN: Near Threatened)
  • Sonoran mountain kingsnake (Lampropeltis pyromelana) at the Arizona-Sonora Desert Museum.
  • Photo: A pale headed rosella (Platycercus adscitus) at the Jurong Bird Park.
  • Picture of an Ida's miter (Mitra idea) at the REEF, at the University of California, Santa Barbara.
  • Picture of A red-breasted merganser (Mergus serrator) in non-breeding plumage at Sylvan Heights Bird Para.
  • Picture of a diamondback terrapin (Malaclemys terrapin) from a private collection.
  • Picture of a diamond dove (Geopelia cuneata) at Healesville Sanctuary.
  • Photo: Spotted spreadwing damselfly (Lestes congener) at Cedar Point Biological Station.
  • Bess beetles, also known as patent leather beetles (Odontotaenius disjunctus) at the University of Nebraska's entomology lab.
  • A federally endangered Cape Sable seaside sparrow, Ammodramus maritimus mirabilis. This bird is down to about 2,000 individuals and declining, with nearly all found within Everglades National Park in south Florida.
  • A vulnerable pygmy slow loris (Nycticebus pygmaeus) at Omaha's Henry Doorly Zoo and Aquarium, Omaha, Nebraska.
  • Picture of a Bornean short-tailed python (Python breitensteini) at Pet Paradise.
  • Photo: Tuxedo darter (Etheostoma lemniscatum) at Conservation Fisheries.
  • Sonoran cantil (Agkistrodon bilineatus bilineatus) at the Arizona-Sonora Desert Museum.
  • Photo: Brown rockfish (Sebastes auriculatus) at East Bay Regional Park District.
  • Picture of a sharp-nosed viper (Deinagkistrodon acutus) at the Dallas Zoo.
  • Photo: Eurasian oystercatcher (Haematopus ostralegus) at Monticello Center in Italy.
  • Photo: Graceful crab (Metacarcinus gracilis) holding eggs under its tail at the Loveland Living Planet Aquarium in Draper, UT.
  • Photo: Western coachwhip (Masticophis flagellum) collected in Chase County, Nebraska.
  • Photo: Starry flounder (Platichthys stellatus) at the Alaska SeaLife Center in Seward, AK.
  • Photo: A Hielscher's day gecko (Phelsuma hielscheri) at the Plzen Zoo.
  • Picture of a red sea urchin (Strongylocentrotus franciscanus) at the REEF, at the University of California, Santa Barbara.
  • Photo: A stout leg baboon (Eucratoscelus pachypus) from a private collection.
  • Photo: Western fat-tailed dwarf lemur (Cheiroqaleus medius) at the Duke Lemur Center.
  • An endangered male northern yellow-cheeked gibbon (Nomascus annamensis) at the Endangered Primate Rescue Center in Cuc Phuong National Park, Vietnam. The animal’s name is ‘Bin’.
  • Photo: Blue ring-necked pheasant at Kamla Nehru Zoological Garden, Ahmedabad, India.
  • Picture of a cecropia moth cocoon (Hyalophora cecropia) at the Minnesota Zoo.
  • Photo: Montane garter snake (Thamnophis exsul) at the San Antonio Zoo.
  • Photo: A Vietnamese walking stick (Baculum extradentatum) at the Kansas City Zoo.
  • A red-crested cardinal (Paroaria coronata) at the Omaha Henry Doorly Zoo, in Omaha, Nebraska.
  • A harpy eagle (Harpia harpyja) at the Los Angeles Zoo.
  • An endangered false gavial (Tomistoma schlegelii) at the San Antonio Zoo.
  • A Great Plains toad (Anaxyrus or Bufo cognatus) at the Phoenix Zoo.
  • Picture of Larry, a Mbu puffer fish (Tetraodon mbu) at Pet Paradise.
  • Photo: Flower beetles (Mecynorrhina polyphemus confluens) at the Budapest Zoo.
  • Photo: An unidentified poker star coral (Montipora sp.) at the Akron Zoo.
  • A male tangerine darter (Percina aurantiaca) at Conservation Fisheries, a native stream fish breeding center. This fish is not imperiled. It has a limited range and is protected by the state of TN.
  • Photo: Black-collared hawk (Busarellus nigricollis) at the National Aviary of Colombia (Aviario Nacional de Colombia).
  • Picture of a sculptured pigtoe (Quadrula infucata) collected from the Ochlockonee River near Tallahassee, Florida.
  • Photo: A spotted python (Anaterisia maculosus) at the Lowry Park Zoo.
  • Photo: American bison (Bison bison) at the Buffalo Zoo.
  • Picture of a spur-winged goose (Plectropterus gambensis) at the Cleveland Metroparks Zoo.
  • Photo: Jabiru stork (Jabiru mycteria) at the National Aviary of Colombia (Aviario Nacional de Colombia).
  • Photo: An endangered Malayan elephant (Elephas maximus indicus) at Singapore Zoo.
  • A long-eared owl (Asio otus tuftsi) at The Wildlife Center in Espanola, NM.
  • Photo: A federally endangered wild caught silver rice rat (Oryzomys palustris natator) on a US Navy property near Key West, FL. This was on Saddlebunch Key.
  • Picture of a striped squirrelfish (Sargocentron xantherythrum) at Pure Aquariums.
  • Photo: A female Montezuma swordtail (Xiphophorus montezumae) at L'aquarium tropical du palais de la Porte DorŽe.
  • A black bullhead (Ameiurus melas) at Gavins Point National Fish Hatchery and Aquarium.
  • Photo: A tanner crab (Chionoecetes bairdi) at the Alaska SeaLife Center.
  • Photo: A wild caught unidentified crab spider from Mt. Makiling forest in Luzon, Philippines.
  • Picture of a house wren from the wild near Thomasville, Georgia.
  • A Madagascar rain frog (Scaphiophryne madagascariensis) at the Omaha Zoo.
  • A hosue gecko (Hemidactylus mabouia) collected in Chitengo Camp, in Gorongosa National Park.
  • Photo: A female giant winged walking stick (Phasma gigas "Jailolo") at the Budapest Zoo.
  • Photo: A military macaw (Ara militaris) at the Denver Zoo. (IUCN: Vulnerable)
  • Photo: A walking stick (Phenacephorus latifemur) from the Plzen Zoo in the Czech Republic.
  • Photo: Desert locust (Schistocerca gregaria) at the Moscow Zoo.
  • A green conure (Aratinga holochlora) at the Gladys Porter Zoo in Brownsville, Texas.
  • Photo: A pin-tailed sandgrouse (Pterocles alchata caudacutus) at the Plzen Zoo in the Czech Republic.
  • A tufted puffin (Fratercula cirrhata) at the Omaha Henry Doorly Zoo, in Omaha, Nebraska.
  • Photo: Common rudd (Scardinius erythrophthalmus) at Alpenzoo in Innsbruck, Austria.
  • Photo: A lemon cichlid (Neolamprologus leleupi) at California Science Center in Los Angeles, California.
  • Photo: Chattering lory (Lorius garrulus flavopalliatus) at Loro Parque Fundacion.
  • Picture of a Southern orange-eyed tree frog (Litoria chloris) at the Wild Life Sydney Zoo.
  • Photo: Federally threatened Decurrent false aster (Boltonia decurrens), at the Missouri Botanical Garden.
  • Photo: Emperor snakehead (Channa marulioides) at Zoo Negara.
  • Photo: A Rodrigues fruit bat (Pteropus rodricensis) at the Lincoln Children's Zoo, Lincoln, Nebraska.
  • Picture of a vulnerable (IUCN) and federally threatened Florida scrub jay (Aphelocoma coerulescens).
  • Photo: A Nigerian rustred tarantula (Hysterocrates laticeps) at Davao Crocodile Park.
  • Photo: A male twig catfish (Farlowella acus) at the Dallas World Aquarium.
  • Photo: A common eland, Taurotragus oryx, at the Blank Park Zoo in Des Moines, Iowa.
  • Photo: A torrent frog tadpole (Telmatobius hintoni) at Museo De Historia Natural "Alcide d'Orbigny". This species is listed as vulnerable on the IUCN Red List.
  • Photo: A female striped fishing spider (Dolomedes scriptus) from the University of Nebraska-Lincoln.
  • A vulnerable 1-year-old fossa, Cryptoprocta ferox, at the Omaha Zoo. This is Madagascar's largest mammalian predator, and its numbers are declining in the wild.
  • An endangered Mexican alligator lizard (Abronia graminea) at the St. Louis Zoo.
  • Photo: A tarantula (Grammostola anthracina) from a private collection.
  • A largemouth bass (Micropterus salmoides) at the Genoa National Fish Hatchery.
  • Picture of a red-bellied woodpecker (Melanerpes carolinus) at St. Francis Wildlife.
  • A vulnerable grey-headed flying fox (Pteropus poliocephalus) at the Australian Bat Clinic. Bats act as pollinators and seed dispensers, however bats are in serious decline around Australia largely due to entanglement in fruit tree netting.
  • Photo: Adult southern river terrapin (Batagur affinis affinis) at the Singapore Zoo.
  • Photo: Western coachwhip (Masticophis flagellum) collected in Chase County, Nebraska.
  • Photo: Madagascar giant day gecko (Phelsuma gradis) at the Sedgwick County Zoo in Wichita, Kansas.
  • Photo: A squacco heron (Ardeola ralloides) at the Prague Zoo.
  • Picture of a critically endangered Tabasara robber frog (Craugastor tabasarae) at El Valle Conservation Center.
  • A yellow-headed blackbird (Xanthocephalus xanthocephalus) at the Wildlife Center in Espanola, New Mexico.
  • Photo: Condoto stubfoot toad (Atelopus spurrelli) at the Cali Zoo in Colombia.
  • Picture of a bronze-winged parrot (Pionus chalcopterus) at the Dallas World Aquarium.
  • Picture of a pajama cardinalfish (Sphaeramia nematoptera) at Omaha's Henry Doorly Zoo and Aquarium.
  • Photo: A female black vasa, Coracopsis nigra nigra, at Loro Parque Fundacion.
  • Florida green water snake (Nerodia floridana) at the Archbold Biological Station.
  • Picture of a Northern Luzon cloud rat (Phloeomys pallidus) at the Plzen Zoo in the Czech Republic.
  • Photo: A big-eyed toad bug (Gelastocoris oculatus) at the Pontotoc Ridge Preserve near Connerville, OK.
  • Photo: Anhinga (Anhinga anhinga) at the National Aviary of Colombia (Aviario Nacional de Colombia).
  • Photo: Blood throat cichlid (Thoracochromis brauschi) at the Moscow Zoo.
  • A pair of vulnerable chinchillas (Chinchilla lanigera) at Zoo Atlanta.
  • A critically endangered Anderson's salamander (Ambystoma andersoni) at Zoo Atlanta.
  • Photo: A male red-tailed black cockatoo (Calyptorhynchus banksii banksii) at Jurong Bird Park, of Wildlife Reserves Singapore.
  • Photo: A silver pheasant (Lophura nycthemera) at Parque Biologico.
  • Picture of a male, federally endangered turquoise parrot (Neophema pulchella) at Healesville Sanctuary.
  • Picture of a wattled jacana's (Jacana jacana) legs at the Dallas World Aquarium.
  • Photo: A black-lip pearl oyster (Pinctada margaritifera) on right and a white-lipped pearl oyster (Pinctada maxima) on left, at Semirara Marine Hatchery Laboratory in the Philippines.
  • Picture of an emerald dove (Chalcophaps indica chrysochlora) at the Wellington Zoo.
  • Photo: Western Meadowhawk dragonfly (Sympetrum occidentale) at Cedar Point Biological Station.
  • Photo: A white-breasted water hen (Amaurornis phoenicurus phoenicurus) on Semirara Island in the Philippines.
  • A green-winged macaw or red and green macaw (Ara chloropterus) at the World Bird Sanctuary.
  • Critically endangered (IUCN) and federally endangered Cumberlandian combshell (Epioblasma brevidens). It has lures that look like fish eggs on top that are used to attract fish. When a fish strikes at the lures, the mussels then eject their larvae into the fish's gills and are able to increase their distribution, even upstream. The Clinch River has more federally listed aquatic species than any river in North America, yet is threatened by pollution and habitat loss. Coal mining in the watershed now raises the threat even more.
  • Photo: A wart snake, or elephant trunk snake (Acrochordus javanicus) at Reptile Gardens.
  • Picture of a vulnerable Florida deermice (Podomys floridanus) from the wild in Florida.
  • A southern white-faced scops owl (Ptilopsis granti) at the Houston Zoo.
  • Photo: Iowa darter (Etheostoma exile) at the University Lab at the University of Minnesota in St. Paul.
  • Picture of an apostlebird (Struthidea cinerea) at Healesville Sanctuary.
  • Vulnerable (IUCN) Oregon spotted frog (Rana pretiosa) at the Sunriver Nature Center in Deschutes County, OR.
  • Photo: Small red scorpionfish, Scorpaena notata, at the Vasco da Gama Aquarium.
  • Picture of a vulnerable male and female Eastern hoolock gibbon (Hoolock leuconedys) at the Gibbon Conservation Center.
  • Photo: A Rio Cauca caecilian or rubber eel (Typhlonectes natans) at the Detroit Zoo.
  • Photo: Four-lined tree frog or common tree frog (Polypedates leucomystax) at the Singapore Zoo.
  • Yellow-throated plated lizard (Gerrhosaurus flavigularis) at the Omaha Zoo.
  • Juvenile golden redhorse (Moxostoma erythrurum) at the Minnesota Department of Natural Resources Center for Aquatic Mollusk Programs.
  • Picture of an Asian millipede (Thyropygus pachyurus) at the St. Louis Zoo.
  • Picture of a male cotton pygmy goose (Nettapus coromandelianus) at Sylvan Heights Bird Park.
  • Photo: A male Chinese ring necked pheasant (Phasianus colchicus torquatus) at the Plzen Zoo.
  • Photo: A giant monkey frog (Phyllomedusa bicolor) at Omaha's Henry Doorly Zoo.
  • Photo: Greyish saltator (Saltator coerulescens) at the National Aviary of Colombia (Aviario Nacional de Colombia).
  • Photo: The Pacific staghorn sculpin (Leptocottus armatus) at the Alaska SeaLife Center.
  • Picture of a whistling kite (Haliastur sphenurus) at Healesville Sanctuary.
  • A volcano rabbit (Romerolagus diazi) at Chapultepec Zoo in Mexico City. (IUCN: Endangered)
  • Picture of a critically endangered narrow-headed softshell turtle (Chitra chitra) at the St. Louis Zoo.
  • A mallard (Anas platyrhynchos) duckling.
  • Photo: An Australian saurus crane (Grus antigone gillae) from a private collection in Choussy, France.
  • Photo: A South Indian scorpion (Heterometrus scaber) at Aquarium Berlin.
  • A ringed map turtle, Graptemys oculifera, at the National Mississippi River Museum and Aquarium in Dubuque, IA. This species is listed as endangered (IUCN) and federally threatened.
  • Photo: A flat rock scorpion (Hadogenes bicolor) at Reptile Gardens.
  • Photo: Caucasian salamander (Mertensiella caucasica) at the Moscow Zoo. This species is listed as Vulnerable according to IUCN.
  • Photo: Blue-headed vireo (Vireo solitarius) at the Wildlife Rehab Center of Minnesota.
  • Photo: Brandt's rice crab (Somanniathelphusa brandti) at Zoo Negara.
  • Photo: A black mamba (Dendroaspis polylepis) at Reptile Gardens.
  • Central newt (Notophthalmus viridescens louisianensis) at the National Mississippi River Museum and Aquarium in Dubuque, IA.
  • Brown baboon tarantula (Citharischius crawshayi) at the Great Plains Zoo.
  • Photo: A helmeted water toad (Calyptocephalella gayi) at the Santiago Zoo in Chile.
  • Photo: A royal antelope (Neotragus pygmaeus) at the LA Zoo.
  • Rainbow darter (Etheostoma caeruleum) at Conservation Fisheries, a native stream fish breeding center.
  • Picture of the feet of an endangered (IUCN) and federally endangered Malayan tapir (Tapirus indicus).
  • Photo: A vulnerable Fiordland penguin (Eudyptes pachyrhynchus) Fiordland penguin at the Taronga Zoo.
  • Picture of a dwarf salamander (Eurycea quadradigitata) from Dagray Resevoir, Arkansas.
  • Photo: A female hooded siskin (Spinus magellanicus sanctaecrucis) at Museo De Historia Natural Alcide d'Orbigny, a natural history museum and rare amphibian breeding center in Chocabamba Bolivia.
  • A female Gray's crowned guenon (Cercopithecus pogonias grayi) named Amanda, named after Spock's mother in Star Trek. There are five individuals left of this species, which is a phase out species, meaning when they're gone, that's it.
  • Photo: Gray redhorse (Moxostoma congestum) at the Albuquerque BioPark's Aquatic Conservation Facility (ACF).
  • Picture of a Central Brazilian rattlesnake (Crotalus durissus terrificus) at the Oklahoma City Zoo.
  • Picture of a magnificent tree frog (Litoria splendida) at the Healesville Sanctuary.
  • Photo: A southern flying squirrel (Glaucomys volans) at Omaha's Henry Doorly Zoo.
  • Picture of a black swallowtail butterfly (Papilio polyxenes)
  • Photo: A horn coral (Hydnophora rigida) at the Akron Zoo.
  • Photo: Guatemalan amazon, also called Costa Rican mealy Amazon, Amazona guatemalae virenticeps, at Loro Parque Fundacion.
  • Photo: Sedge wren, Cistothorus platensis, at the Wildlife Rehabilitation Center of Minnesota.
  • Picture of a federally endangered juvenile broad-nosed caiman (Caiman latirostris) at the Sedgwick County Zoo.
  • European fire salamander (Salamandra salamandra bernardezi) at the St. Louis Zoo.
  • Photo: Rainforest Snail (Hadra webbi) at Melbourne Zoo.
  • A federally-endangered snail kite (Rostrhamus sociabilis) at the Audubon Center for Birds of Prey, a rehab and education center.
  • A Tennessee cave salamander (Gyrinophilus palleucus) at the Tennessee Aquarium, Tennessee. (IUCN: Vulnerable)
  • An endangered keeled box turtle (Cuora mouhotii) at the Tennessee Aquarium in Chattanooga.
  • Picture of a Caspian tern (Hydroprogne caspia) at Tracy Aviary.
  • A captive English/house sparrow (Passer domesticus) photographed at a studio in Lincoln, NE.
  • A Red tegu lizard (Tupinambis rufescens) at Parco Natura Viva, in Bussolengo, Italy.
  • A male house finch (Carpodacus mexicanus) at the Brown Ranch, Texas.
  • Photo: Southwestern speckled rattlesnake (Crotalus mitchellii pyrrhus) at the LA Zoo.
  • Bourke's parrot (Neopsephotus bourkii) at Parrots in Paradise, a bird attraction in Glass House Mountains, Queensland.
  • Photo: Oregon forestsnail (Allogona townsendiana) at the Trinity Western University.
  • Photo: Trachyaretaon sp "AuroraÓ at the Budapest Zoo. This is new to science.
  • Picture of an endangered Asian elephant (Elephas maximus).
  • Picture of a laughing gull in breeding plumage (Leucophaeus atricilla) at the National Aviary of Colombia.
  • Photo: Western grebes (Aechmophorus occidentalis) at International Bird Rescue Center.
  • Photo: Arafura file snake (Acrochordus arafurae) at Lilydale High School in Australia.
  • Photo: South European nase (Protochondrostoma genei) at Alpenzoo in Innsbruck, Austria.
  • Photo: Bronze featherback (Notopterus notopterus) at Zoo Negara.
  • A stubfoot toad (Atelopus limon) infected with chytrid fungus at a lab in Quito, Ecuador. (IUCN: Critically Endangered)
  • Photo: A blue naped parrot (Tanygnathus lucionensis lucionensis) at Loro Parque Fundacion.
  • Photo: Plum faced lorikeet (Oreopsittacus arfaki major) at Loro Parque Fundacion.
  • Photo: Cinnabar moth (Tyria jacobaeae) at the Trinity Western University.
  • A venomous Eastern green mamba (Dendroaspis angusticeps) at Reptile Gardens near Rapid City, South Dakota.
  • Photo: A blue ram cichlid (Mikrogeophagus ramirezi) at the Fish Biodiversity Lab at Auburn University.
  • A bar-headed Goose (Anser indicus) at the Houston Zoo.
  • Photo: Horse conch (Pleuroploca gigantea) from Gulf Specimen Marine Laboratories.
  • Photo: Peninsular barking deer (Muntiacus muntjak peninsulae) at Zoo Negara.
  • Picture of a female adult common starling (Sturnus vulgaris vulgaris) at Centro Fauna Selvatica "Il Pettirosso".
  • Photo: Large fig parrot (Psittaculirostris desmarestii occidentalis) at Loro Parque Fundacion.
  • Western cottonmouth (Agkistrodon piscivorous leucostoma) at the Tulsa Zoo.
  • Photo: An upside down catfish (Synodontis nigriventris) at River Safari.
  • A vulnerable Swainson's toucan (Ramphastos ambiguus swainsonii) at the Omaha Henry Doorly Zoo, in Omaha, Nebraska.
  • Photo: Chattooga River crayfish, Cambarus scotti, at West Liberty University in West Liberty, WV. This specimen is from Consauga River, TN.
  • Photo: Grey triggerfish (Balistes capriscus) at Gulf Specimen Marine Lab and Aquarium.
  • A gerbil (Meriones unguiculatus) at the Safari Land Pet Store.
  • Picture of Tara, a brown parrot (Poicephalus meyeri) at Alabama Gulf Coast Zoo.
  • Photo: Red veiled chiton (Placiphorella rufa) at the Alaska SeaLife Center in Seward, AK.
  • A vulnerable reticulated giraffe (Giraffa camelopardalis reticulata) with finer white lines in pattern, and an endangered Rothschild giraffe (Giraffa camelopardalis rothschildi) at Rolling Hills Wildlife Adventure near Salina, Kansas.
  • A Dekay's brownsnake (Storeria dekayi texana) collected from Nebraska.
  • Picture of a barking owl (Ninox connivens) at the Healesville Sanctuary.
  • Picture of two plum-head parakeets (Psittacula cyanocephala) at Pandemonium Aviaries in Los Altos Hills, California.
  • Photo: A male red jungle fowl (Gallus gallus) at the Assam State Zoo cum Botanical Garden.
  • Photo: Emerald shiner (Notropis atherinoides) at the University Lab at the University of Minnesota in St. Paul.
  • Picture of two rough harvester ants (Pogonomyrmex rugosus) at Springs Preserve.
  • Six-month-old Greek tortoises (the large one is Testudo marginata, and the smaller one is testudo graeca) at Parco Natura in Bussolengo, Italy.
  • Photo: A pimpleback (Cyclonaias putsulosa) at the Center for Aquatic Mollusk Programs in Lake City, Minnesota.
  • Photo: Noble macaw, Diopsittaca cumanensis cumanensis, at Loro Parque Fundacion.
  • Photo: Eastern carpenter bee (Xylocopa virginica) at the Audubon Insectarium.
  • Picture of a Western gull (Larus occidentalis) at the Santa Barbara Wildlife Care Network.
  • Photo: A male lesser nighthawk (Chordeiles acutipennis) at Rogers Wildlife Rehabilitation Center.
  • Picture of a male and a female rainbow stag beetle (Phalacrognathus muelleri) at the Houston Zoo.
  • Picture of a critically endangered narrow-headed softshell turtle (Chitra chitra) at the St. Louis Zoo.
  • Photo: Acheta domesticus, commonly called the house cricket.
  • Picture of a Murray River rainbowfish (Melanotaenia fluviatilis) at Healesville Sanctuary.
  • A Kenya crested guineafowl (Guttera pucherani pucherani) at the Gladys Porter Zoo in Brownsville, Texas.
  • Photo: Large postman (Heliconius hortense) at Butterfly Pavilion.
  • Photo: A goldbreast splitfin (Ilyodon furcidens) at Aquarium Berlin.
  • Brazilian rainbow boa (Epicrates cenchria cenchria) at the Great plains zoo.
  • Picture of a scarlet-rumped cacique (Cacicus uropygialis) at the National Aviary breeding center in Palmar, Colombia.
  • Picture of a vulnerable South American red-footed tortoise (Geochelone carbonaria) at the Kansas City Zoo.
  • A chipping sparrow (Spizella passerina) at the Brown Ranch, Texas.
  • Photo: Giant flower beetle (Mecynorhina torquata ugandensis) at Houston Zoo
  • Photo: A Madagascan blue pigeon (Alectroenas madagascariensis) at the Plzen Zoo in the Czech Republic.
  • Photo: Dracula, a critically endangered Golden-bellied capuchin (Cebus xanthosternos) at the Lisbon Zoo
  • Photo: An African glass catfish (Pareutropius debauwi) at the Singapore Zoo's River Safari area.
  • Canal zone treefrog (Hypsiboas rufitelus) at Zoo Atlanta.
  • Photo: Endangered Cope's arboreal alligator lizard (Abronia aurita) at Urban Ark Conservation.
  • A Mexican ratsnake (Elaphe flavirufa flavirufa) at the Gladys Porter Zoo in Brownsville, Texas.
  • A male painted bunting (Passerina ciris) at the Brown Ranch in Texas. (IUCN: Near Threatened)
  • A vulnerable (IUCN) and federally endangered California tiger salamander (Ambystoma californiense) at the Fresno Cahffee Zoo, Fresno, California.
  • Photo: A white dove at the Capital Humane Society in Lincoln.
  • Photo: White-throated woodrat (Neotoma albigula) at the Arizona-Sonora Desert Museum.
  • Picture of a pair of four-banded sandgrouse (Pterocles quadricinctus) at the Tulsa Zoo.
  • Photo: Jackknife fish (Equetus lanceolatus) photographed at Downtown Aquarium in Denver, Colorado.
  • A hippopotamus (Hippopotamus amphibius) at the San Antonio Zoo. (IUCN: Vulnerable)
  • Photo: Barred owl (Strix varia varia) at Monticello Center in Italy.
  • Photo: An endangered Sakaramy killifish (Pachypanchax sakaramyi) at Denver Zoo.
  • Picture of a lined surgeonfish (Acanthurus lineatus) at Omaha's Henry Doorly Zoo and Aquarium.
  • Photo: A green turaco (Tauraco persa persa) from a private collection in Choussy, France.
  • Photo: Tiger goby (Valenciennea wardii) at Pure Aquariums.
  • A bat eared fox (Otocyon megalotis virgatus) at the Plzen Zoo.
  • Picture of a D'Albert's python or white lipped python (Leiopython albertisii) at the Knoxville Zoo.
  • Photo: Splendid sunbird (Cinnyris coccinigastrus) at the Houston Zoo.
  • Picture of a Zambezi flapshelled turtle (Cycloderma frenatum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.
  • Photo: An unidentified stonefly nymph (Isoperla sp.), aquatic invertebrate from Mores Creek near Idaho City, Idaho.
  • Photo: Giant pikehead (Luciocephalus pulcher) at Zoo Negara.
  • Topeka shiners (Notropis topeka) at the University of Kansas Field Station. (US: Endangered)
  • Picture of a red-crested turaco (Tauraco erythrolophus) at the Bramble Park Zoo, Watertown, South Dakota.
  • Studio portrait of a northern red-backed vole (Clethrionomys rutilus.)
  • An ocelot (Leopardus pardalis) at the Omaha Zoo.
  • A narrow-banded morph of a Kokoe poison frog (Phyllobates aurotaenia) from a private collection.
  • Photo: An endangered Guangxi warty newt (Paramesotriton guangxiensis) at the Moscow Zoo.
  • A Wehrle's salamander (Plethodon wehrlei) from a private collection.
  • A Raggiana bird-of-paradise (Paradisaea raggiana) at the Cincinnati Zoo.
  • Picture of a tropical mockingbird (Mimus gilvus) at the National Aviary of Colombia.
  • Photo: Two Brazilian guinea pigs (Cavia aperea) from the wild at the Membeca Lagos Farm, near Rio de Janeiro, Brazil.
  • Eastern yellow-billed hornbill (Tockus flavirostris flavirostris) at the Indianapolis Zoo.
  • Picture of a pygmy hippopotamus (Choeropsis liberiensis) named Betty at the Omaha Zoo. Listed as endangered (IUCN)
  • Photo: Caterpillar of the purple mort bleu (Eryphanis polyxena at Butterfly Pavilion in Westminster, Colorado.
  • Photo: A humpback limia (Limia nigrofasciata) at the Denver Zoo.
  • Picture of a male Chilean pintail (Anas georgica spinicauda) at Sylvan Heights Bird Park.
  • Picture of an orange eyed tree frog (Litoria chloris) at Wild Life Sydney Zoo.
  • A venomous Eastern green mamba (Dendroaspis angusticeps) at Reptile Gardens near Rapid City, South Dakota.
  • Photo: A palm tanager (Tangara palmarum palmarum)at the Membeca Lagos Farm, near Rio de Janeiro, Brazil.
  • Photo: At Anastasia Island State Park, home to the federally endangered Anastasia Island beach mouse (Peromyscus polionotus phasma).
  • Photo: A juvenile monkey face eel (Cebidichthys violaceus) at East Bay Regional Park District.
  • Photo: An endangered whitefin or whiteseam fighting fish (Betta albimarginata) from a private collection in Knoxville, Tennessee.
  • Photo: A longnose harlequin frog (Atelopus longirostris) at Centro Jambatu in Quito, Ecuador.
  • Texas leafcutter ants (Atta texana) feed on an apple core at the Dallas Zoo.
  • Picture of a Scimitar-horned oryx (Oryx dammah) at Rolling Hills Zoo.
  • Photo: Blue-headed wrasse (Thalassoma bifasciatum) from Gulf Specimen Marine Laboratories.
  • Picture of a blue-tailed fire-bellied newt (Cynops cyanurus) at the St. Louis Zoo.
  • Photo: A broadstripe shiner (Pteronotropis euryzonus) at Fish Biodiversity Lab, Auburn University, Auburn, Alabama.
  • Photo: A slender hemiodus (Hemiodus gracilis) at Dallas World Aquarium.
  • Photo: Grandfather Mountain crayfish (Cambarus eeseeohensis) from the wild.
  • Photo: A vulnerable Fiordland penguin (Eudyptes pachyrhynchus) Fiordland penguin at the Taronga Zoo.
  • Photo: Dusky pipefish (Syngnathus floridae) at Ripley's Aquarium of Canada.
  • Photo: Sitatunga (Tragelaphus spekii) at the Madrid Zoo.
  • A mallard (Anas platyrhynchos) duckling.
  • A federally threatened Cuban iguana (Cyclura nubila nubila) at the San Diego Zoo.
  • A boxelder bug (Boisea trivittata).
  • Photo: A magnolia jumping spider (Lyssomanes viridis) at the University of Florida in Gainesville.
  • Photo: Red tailed Amazon, Amazona brasiliensis, at Loro Parque Fundacion.
  • Photo: Pacific red hermit crab (Elasdochirus gilli) and whitehand hermit crab (Elassochirus tenuimanus) at the Alaska SeaLife Center.
  • Photo: A Mexican mojave rattlesnake (Crotalus scutellatus salvinii) at Reptile Gardens.
  • A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.
  • Picture of a strawberry dart frog (Oophaga (Dendrobates) pumilio).
  • Photo: An endangered june sucker (Chasmistes liorus) at the Loveland Living Planet Aquarium in Draper, UT.
  • Picture of a critically endangered, male blue-knobbed curassow (Crax alberti) at the Houston Zoo
  • Photo: Smooth star coral (Solenastrea bournoni) at Mote Tropical Research Laboratory.
  • Picture of a ternate damsel (Amblyglyphidodon ternatensis) at the Oceanario in Palmar, Colombia.
  • Photo: A Colorado chipmunk (Neotamias quadrivittatus) at Nebraska Wildlife Rehab.
  • Photo: A red-billed blue magpie (Urocissa erythrorhyncha magnirostris) from a private collection in Choussy, France.
  • Photo: An Argentinean scorpion (Tityus trivittatus) at Plzen Zoo in the Czech Republic.
  • A sturgeon chub (Macrhybopsis gelida).
  • Photo: A critically endangered Philippine eagle (Pithecophaga jefferyi) at the Philippine Eagle Center.
  • Photo: A male long-wattled umbrellabird (Cephalopterus penduliger) at the Dallas World Aquarium.
  • Picture of a warty sea anemone (Bunodosoma cavernata) at Gulf Specimen Marine Lab and Aquarium.
  • Photo: A spindle elima (Elimia capillaris) photographed at the Alabama Aquatic Biodiversity Center in Marion, AL. This species is listed as vulnerable by IUCN.
  • A Sonoran desert toad (Incilius alvarius) at the Tulsa Zoo.
  • Photo: Glossy ibis (Plegadis falcinellus) from the Budapest Zoo.
  • A southern three-banded armadillo (Tolypeutes matacus) at the Lincoln Children's Zoo, Lincoln, Nebraska. (IUCN: Near Threatened)
  • Picture of a blue-faced parrotfinch (Erythrura trichroa) from a private collection.
  • Photo: An endangered Siberian salamander (Ranodon sibiricus) at the Moscow Zoo.
  • A West African dwarf crocodile (Osteolaemus tetraspis tetraspis) at the Lincoln Children's Zoo. This species is federally endangered and listed as vulnerable on IUCN.
  • Photo: An white-bellied bustard (Eupodotis senegalensis) at Parque Biologico.
  • Photo: Guatemalan amazon, Amazona guatemalae guatemalae, at Loro Parque Fundacion.
  • Photo: White-collared beauty or white-collared tarantula (Eupalaestrus weijenberghi) at Butterfly Pavilion in Westminster, Colorado.
  • A short beaked echidna (Tachyglossus aculeatus lawesii) at the Plzen Zoo.
  • Photo: A blue-headed parrot (Pionus menstruus rubrigularis) at Zoologico de Quito.
  • Crowned iguana (Laemanctus serratus) from the Omaha Zoo.
  • Picture of a red bamboo snake (Oreocryptophis porphyraceus laticincta) from a private collection.
  • Photo: Turquoise winged parrotlet (Forpus spengeli) at Loro Parque Fundacion.
  • Oriental or eastern dollarbird (Eurystomus orientalis orientalis) at the Sedgwick County Zoo in Wichita, Kansas.
  • Photo: Great jerboa (Allactaga major) at the Moscow Zoo.
  • Photo: A critically endangered Alaotran bamboo lemur (Hapalemur alaotrensis) at the Plzen Zoo.
  • A North American beaver (Castor canadensis).
  • A federally endangered Salt Creek tiger beetle (Cicindela nevadica lincolniana) in a lab at the University of Nebraska-Lincoln. With a count of fewer than 250 adults in the summer of 2007, this subspecies of tiger beetle could be the rarest insect in North America. Found only in the interior saline wetlands of Lancaster County, Nebraska, the beetle has been in decline for years due to habitat loss from development.
  • Photo: A club-horned grasshopper (Aeropedellus clavatus) at the Niwot Ridge Long Term Ecological Research site, near Nederland, CO. This research site is funded by the National Science Foundation.
  • White peacock butterfly (Anartia jatrophae) a native to Nebraska, at the Lincoln Children's Zoo.
  • A Texas blind snake (Leptotyphlops dulcis) at the Gladys Porter Zoo in Brownsville, Texas.
  • Photo: South African pygmy mouse (Mus minutoides) at the Plzen Zoo in the Czech Republic.
  • Photo: Brazil poison frog (Ranitomeya vanzolinii) from a private collection.
  • Photo: A gidgee skink (Egernia stokesii) at Reptile Gardens.
  • Photo: A juvenile northern rough-winged swallow (Stelgidopteryx serripennis serripennis) at the Wildlife Rehabilitation Center of Minnesota.
  • A five-lined skink (Eumeces fasciatus) collected from the Conasauga River.
  • Snowy egret (Egretta thula) at the Lincoln Children's Zoo.
  • Photo: 'Nyango', the only confirmed Cross River gorilla (Gorilla gorilla diehli) in captivity in the world.
  • Photo: A brown trout (Salmo trutta) at the Schramm Education Center near Gretna, NE.
  • A lesser flamingo (Phoeniconaias minor) at the Cleveland Metroparks Zoo.
  • Photo: A female Calumma malthe from a private collection.
  • Photo: A four-horned chameleon (Chamaeleo quadricornis quadricornis) at the Saint Louis Zoo.
  • A juvenile musk ox (Ovibos moschatus moschatus) at the University of Alaska in Fairbanks, AK.
  • Picture of a trumpeter swan (Cygnus cygnus buccinator) at the Houston Zoo.
  • Photo: An Eurasian jay (Garrulus glandarius fasciatus) at Parque Biologico.
  • Nene geese (Branta sandvicensis) at the Great Plains Zoo, Sioux Falls, South Dakota. (IUCN: Vulnerable; US: Endangered)
  • Picture of a dwarf hawkfish or Falco's hawkfish (Cirrhitichthys falco) at Nebraska Aquatic Supply.
  • Photo: An Asian painted frog, or chubby frog (Kaloula pulchra) from the Fish N Stuff pet store in Yankton.
  • Photo: Little cormorant (Phalacrocorax niger) at Kamla Nehru Zoological Garden, Ahmedabad, India.
  • Photo: A horseshoe crab flatworm (Bdelloura candida) at Gulf Specimen in Panacea, Florida.
  • A Guam rail (Hypotaenidi owstoni) at the Sedgwick County Zoo, Wichita, Kansas. Though reintroduction efforts are underway, this species is considered extinct in the wild (IUCN) and federally endangered.
  • Photo: A flat rock scorpion (Hadogenes granulatus) at the St. Louis Zoo.
  • Photo: An white-bellied bustard (Eupodotis senegalensis) at Parque Biologico.
  • Picture of an Eastern fence lizard (Sceloporus undulatus) at the Lowry Park Zoo in Tampa, Florida.
  • Photo: A greater spotted eagle (Aquila clanga) at the Plzen Zoo in the Czech Republic.
  • An endangered Yellow Asian pond turtle (Mauremys nigricans) at the Denver Aquarium.
  • A Blue Ridge spring salamander (Gyrinophilus porphyriticus danielsi) at the Tennessee Aquarium, Tennesssee.
  • Photo: Bearded vulture (Gypaetus barbatus) at Parco Natura Viva.
  • Picture of an African black duck (Anas sparsa) at Sylvan Heights Bird Park.
  • Photo: Bolivian cavy (Galea monasteriensis) at the Plzen Zoo in the Czech Republic.
  • Photo: A Parkinson’s rainbowfish (Melanotaenia parkinsoni) at the Downtown Aquarium in Denver, Colorado.
  • Photo: A desert agama (Trapelus mutabilis) at the Plzen Zoo in the Czech Republic.
  • Photo: A unidentified scorpion (Iomachus sp.) at Plzen Zoo in the Czech Republic.
  • A federally endangered yellow-footed rock wallaby (Petrogale xanthopus) at Omaha Zoo's Wildlife Safari Park.
  • A white rhinoceros (Ceratotherium simum simum) at Rolling Hills Wildlife Adventure in Salina, Kansas.
  • Photo: An endangered swift parrot (Lathamus discolor) at Healesville Sanctuary.
  • Picture of a longspined porcupinefish also known as a freckled porcupinefish or Porcupine pufferfish (Diodon holocanthus) at the Nebraska Aquatic Supply.
  • A gray rat snake (Pantherophis obsoleta spiloides)at the Estuarium in Dauphin Island, AL.
  • Photo: An Australian sea apple (Pseudocolochirus axiologus) at the Dallas World Aquarium.
  • Budgett's frog (Lepidobatrachus laevis) at the Baltimore Aquarium.
  • Picture of a federally endangered poweshiek skipperling (Oarisma poweshiek) at the Minnesota Zoo.
  • Photo: A Spix’s horned treefrog (Hemiphractus scutatus) at Balsa de los Sapos.
  • Picture of a cecropia moth caterpillars (Hyalophora cecropia) at the Minnesota Zoo.
  • Photo: Terrestrial garter snake (Thamnophis elegans) collected in South Dakota.
  • Photo: Golf ball crab (Rhinolithodes wosnessenskii) at Aquarium of the Pacific in Long Beach, CA.
  • A great grey owl (Strix nebulosa nebulosa) at the New York State Zoo.
  • Green frog (Rana clamitans) at the Toledo Zoo.
  • Monk parakeet or quaker parrot (Myiopsitta monachus) at the University of Nebraska-Lincoln. This and other corvid species are studied to learn how cognition evolved, how animals use cognitive abilities to solve problems in nature and how cognitive abilities can affect the evolutionary process.
  • Picture of a juvenile common or European starling (Sturnus vulgaris) at the Wildlife Center of Silicon Valley.
  • Picture of a long-clawed hermit crab, Pagurus longicarpus, at the Sedge Island Natural Resource Education Center in the Sedge Islands Marine Conservation Zone, Barnegat Bay, New Jersey.
  • Picture of a little spotted kiwi or little gray kiwi (Apteryx owenii owenii) at the Wellington Zoo.
  • A buff-crested bustard (Lophotis gindiana) at the Columbus Zoo.
  • A Nanday conure (Aratinga nenday) at the Jurong Bird Park.
  • Picture of a vulnerable (IUCN) and federally endangered cheetah (Acinonyx jubatus) at the Columbus Zoo.
  • A male common grackle (Quiscalus quiscula) at the San Antonio Zoo.
  • Two Madagascar partridges (Margaroperdix madagarensis) at PBZT, the Parc Botanique Et Zoologique de Tsimbazaza.
  • Photo: Tube anemone (Cerianthus sp.) at Butterfly Pavilion.
  • A male (front) and female brown-headed cowbird (Molothrus ater) at the San Antonio Zoo.
  • An endangered (IUCN and US) golden-cheeked warbler (Dendroica chrysoparia) at Fort Hood, Texas.
  • Photo: Black kite (Milvus migrans migrans) at Lisbon Zoo.
  • A vulnerable (IUCN) wolverine (Gulo gulo) named Stinky, a candidate species for federal protection.
  • Photo: Savannah darters (Etheostoma fricksium) from a private collection in Knoxville, Tennessee.
  • Photo: Tiburon burrowing frog (Eleutherodactylus aporostegus) at the Philadelphia Zoo. This species is found in Haiti and is critically endangered.
  • Photo: Black agouti (Dasyprocta fuliginosa) at Parque Jaime Duque near Bogota, Colombia.
  • Close up of a blood python (Python brongersmai) at the Omaha Zoo.
  • A longhorn beetle (Moechotypa marmorea( from the wild at the Endangered Primate Rescue Center in Cuc Phuong National Park, Vietnam.
  • Photo: A western plated lizard (Broadleysaurus major bottegoi) at the Jacksonville Zoo and Gardens, Jacksonville, Florida.
  • Photo: A wattled curassow (Crax globulosa) at Mantenedor da Fauna Silvestre Cariuá.
  • Photo: Samar water monitor (Varanus samarensis) from the private collection in San Antonio.
  • Photo: ViellardÕs chameleon gecko (Eurydactylodes vieillardi) at the Plzen Zoo in the Czech Republic.
  • Photo: A Florida carpenter ant (Camponotus floridanus) at the Urban Entomology Lab at the University of Florida at Gainesville.
  • Photo: A young, male brown goshawk (Accipiter fasciatus) at Moonlit Sanctuary.
  • Hadada or Hadeda Ibis (Bostrychia hagedash brevirostris) at the Henry Doorly Zoo and Aquarium.
  • Photo: A male wolf spider (Schizocosa chiracahua) from the University of Nebraska-Lincoln.
  • Photo: Harperella (Ptilimnium nodosum) a federally endangered plant that is native to wetlands on the Atlantic and Gulf Coasts.
  • Photo: An endangered male gray-bellied marsupial frog (Gastrotheca litonedis) at Centro Jambatu in Quito, Ecuador.
  • Photo: A Brazilian guinea pig (Cavia aperea) from the wild at the Membeca Lagos Farm, near Rio de Janeiro, Brazil.
  • Photo: Figeater beetle (Cotinis mutabilis) at the Sacramento Zoo.
  • Picture of a long-toed lapwing (Vanellus crassirostris) at Sylvan Heights Bird Park.
  • Photo: A tiger sumo loach (Schistura paucireticulata) at the Singapore Zoo's River Safari area.
  • Photo: King's crown conch (Melongena corona) at the Conservancy of Southwest Florida in Naples, Florida.
  • Photo: An endangered Mishmi takin (Budorcas taxicolor taxicolor) at Tierpark Berlin.
  • Picture of a vulnerable (IUCN) and federally endangered Western tragopan (Tragopan melanocephalus) at Himalyan Nature Park in Kufri, India.
  • Picture of a thick-billed euphonia (Euphonia laniirostris) at the National Aviary breeding center in Palmar, Colombia.
  • A captive critically endangered (IUCN) and federally endangered California condor (Gymnogyps californianus) at the Phoenix Zoo.
  • A purplish copper butterfly (Lycaena helloides). Although this species is found in many states, the Ohio population is relegated to a single roadside ditch near the Toledo Airport.
  • Photo: Buffalo sculpin (Enophrys bison) at East Bay Regional Park District.
  • Photo: Amur ratsnake (Elaphe anomala) at Wroclaw Zoo.
  • A Barbary falcon (Falco pelegrinoides).
  • Photo: American white pelican (Pelecanus erythrorhynchos) at Rogers Wildlife Rehabilitation Center.
  • Baja California rattlesnake (Crotalus enyo) a Mexican species found on the Baja Peninsula at the Arizona-Sonora Desert Museum.
  • A caterpillar on Bioko Island, Equatorial Guinea.
  • Photo: A Big Sandy crayfish, Cambarus veteranus, wild caught near in West Liberty, West Virginia.
  • A black-chinned hummingbird (Archilochus alexandri) at the Brown Ranch, Texas.
  • A long-snouted robber frog (Pristimantis appendiculatus) near Mindo, Ecuador.
  • Black tailed prairie dog (Cynomys ludovicians) at the Sedgwick County Zoo.
  • Picture of a northwestern garter snake (Thamnophis sirtalis) at the Oregon Zoo.
  • Coyote puppies (Canis latrans).
  • Photo: Prickly sculpin (Cottus asper) at the Fish Conservation and Culture Lab in Byron, CA at UC Davis.
  • An Indian rock python (Python molurus) at the Cleveland Metroparks Zoo.
  • A vulnerable (IUCN) greater prairie-chicken (Tympanuchus cupido.)
  • Yellow-lined poison dart frog (Dendrobates truncatus). The photo was taken at the National Aquarium in Baltimore.
  • Photo: Midday gerbil (Meriones meridanus nogaiorum) at the Moscow Zoo.
  • Photo: Speckled sanddab (Citharichthys stigmaeus) at East Bay Regional Park District.
  • Picture of an endangered yellow-cheeked gibbon (Nomascus gabriellae) at the Endangered Primate Rescue Center in Cuc Phuong National Park, Vietnam.
  • Flap-necked chameleon (Chamaeleo dilepis) collected in Gorongosa National Park.
  • Photo: Virginia metallic tiger beetle (Tetracha virginica) caught in the Tide Swamp Unit of Big Bend Wildlife Management Area.
  • Photo: A banded water snake (Nerodia fasciata fasciata) at Reptile Gardens.
  • Picture of a vulnerable Spur-thighed tortoise (Testudo graeca) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.
  • Photo: Amargosa speckled dace (Rhinichthys osculus nevadensis) collected on the Amargosa River in Tecopa, California.
  • Photo: A male lineated woodpecker (Dryocopus lineatus) at the National Aviary of Colombia.
  • A ground beetle larvae (Dicaelus sp.) in a lab at the University of Nebraska-Lincoln.
  • Photo: Nubian goat at the Lincoln Children's Zoo.
  • Picture of a fork-tailed kite (Milvus migrans affinis) at the Healesville Sanctuary.
  • A spur-winged plover (Vanellus spinosus) at the Houston Zoo.
  • Photo: A cordilleran parakeet (Psittacara frontatus minor) at Loro Parque Fundacion.
  • A Moiese burbot (Lota lota) at the Kootenai Tribal Hatchery, Idaho.
  • Photo: Golf ball sponge, or orange puffball sponge (Tethya aurantium) at Gulf Specimen Marine Lab and Aquarium.
  • Photo: A saltwater crocodile (Crocodylus porosus) at Dreamworld.
  • Photo: Orange breasted fig parrot (Cyclopsitta gulielmitertii) at Loro Parque Fundacion.
  • Photo: A summer azure butterfly (Celastrina neglecta) photographed at Spring Creek Prairie Audubon Center near Denton, NE. This animal was originally collected from Bobcat Prairie near Denton, NE.
  • Photo: Dickcissel (Spiza americana) wild caught by biologists using a mist net, near Wood River, Nebraska.
  • Photo: Luciosoma trinema (no common name) at Zoo Negara.
  • Photo: An Iraqi spiny-tailed lizard (Saara loricata) at Prague Zoo. This is the male.
  • Photo: A brahminy kite (Haliastur indus indus) at Singapore Zoo.
  • The federally endangered Iowa Pleistocene Snail (Discus macclintocki). This is a relict from the last ice age, some 400,000 years ago. It lives in cold air vents on 37 different hillsides in Iowa (and one in Illinois) and survives only in the cold air that blows past underground ice and out of the cracks in limestone cliffs.
  • A black flying fox (Pteropus alecto) at the Australian Bat Clinic. Bats act as pollinators and seed dispensers, however bats are in serious decline around Australia largely due to entanglement in fruit tree netting.
  • Photo: A Kawall’s amazon (Amazona kawalli) at Fundacao Jardim Zoologico de Brasilia.
  • Photo: A female barbary stag or atlas deer (Cervus elaphus barbarus) at Tierpark Berlin.
  • Photo: A red and white giant flying squirrel (Petaurista alborufus) at Night Safari, part of Wildlife Reserves Singapore.
  • Photo: A black-banded owl (Ciccaba huhula huhula) at Mantenedor da Fauna Silvestre Cariuá.
  • Photo: Moustached parakeet (Psittacula alexandri abbotti) at Loro Parque Fundacion.
  • Photo: A water monitor (Varanus salvator salvator) at Parco Natura Viva in Bussolengo, Italy.
  • Picture of tuataras (Sphenodon punctatus) at the Wellington Zoo.
  • A North American beaver (Castor canadensis) Nebraska Wildlife Rehab.
  • Photo: An Asian box turtle (Cuora amboinensis couro) at Ragunan Zoo in Jakarta, Indonesia.
  • Hong Kong newt (Paramesotriton hongkongensis) at the Tennessee Aquarium.
  • A pair of vulnerable 1-year-old fossas, Cryptoprocta ferox, at the Omaha Zoo. This is Madagascar's largest mammalian predator, and it's numbers are declining in the wild.
  • Photo: Egg pouch containing a small-spotted catshark, Scyliorhinus canicula, at the Vasco da Gama Aquarium.
  • Photo: Giant Asian mantis (Hierodula grandis) at the Budapest Zoo.
  • A Kootenai River white sturgeon (Acipenser transmontanus) at the Kootenai Tribal Hatchery. (US: Endangered)
  • Photo: A kaiser spotted newt (Neurergus kaiseri) from Conservation Fisheries.
  • Photo: Spanish festoon (Zerynthia rumina) at Graham's Quinta dos Malvedos Vineyard.
  • A vulnerable (IUCN) and federally threatened polar bear (Ursus maritimus) at the Tulsa Zoo.
  • Picture of a spotted whistling duck (Dendrocygna guttata) at the Sylvan Heights Bird Park.
  • A boreal toad (Anaxyrus boreas boreas) at the Cheyenne Mountain Zoo.
  • Photo: A male and female Florida grasshopper sparrow (Ammodramus savannarum floridanus) at White Oak Conservation Center, Yulee, Florida.
  • Photo: The painted hickory borer (Megacyllene caryae) from a private collection.
  • Photo: A Mangrove salt marsh snake (Nerodia clarkii compressicauda) at a private collection.
  • Picture of a king vulture (Sarcoramphus papa) from the Gladys Porter Zoo in Brownsville, Texas
  • Picture of a blue-tailed fire-bellied newt (Cynops cyanurus) at the St. Louis Zoo.
  • Photo: Shimofuri goby (Tridentiger bifasciatus) at the Fish Conservation and Culture Lab in Byron, CA at UC Davis.
  • Photo: Silver variation, red fox (Vulpes vulpes) named "Sterling" at Southwest Wildlife Conservation Center.
  • A robber frog (Pristimantis species) near Limon, Ecuador.
  • Photo: An eastern screech owl, (Megascopes asio), at a raptor recovery center near Lincoln, NE.
  • Picture of a male katydid (Chloroscirtus discocercus), which was caught in the wild in Gamboa, Panama.
  • An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.
  • A nine-banded armadillo (Dasypus novemcintus) at the Tulsa Zoo, Tulsa, Oklahoma.
  • A white-striped gecko (Gonatodes vittatus) from a private collection.
  • A crawfish from Bioko Island, Equatorial Guinea.
  • Photo: A male tailless whipscorpion (Paraphrynus laevifrons) from the University of Nebraska-Lincoln.
  • Picture of White Cloud Mountain minnows (Tanichthys albonubes) at the Tulsa Zoo.
  • Bigmouth buffalo (Ictiobus cyprinellus) at Gavins Point National Fish Hatchery and Aquarium.
  • Picture of a foxfish (Bodianus frenchii) at Omaha's Henry Doorly Zoo and Aquarium.
  • Picture of a magnificent tree frog (Litoria splendida) at the Healesville Sanctuary.
  • Picture of a federally endangered Asiatic golden cat (Catopuma temminckii) at the Assam State Zoo cum Botanical Garden in Guwahati, Assam, India.
  • A tundra swan (Cygnus columbianus columbianus) at the Carolina Waterfowl Rescue.
  • Photo: Domestic rats at the Sunset Zoo.
  • A rufescent tiger-heron (Tigrisoma lineatum marmoratum) at Fundacao Jardim Zoologico de Brasilia.
  • Picture of a Mossy leaf-tailed gecko (Uroplatus sikorae) at the Omaha Zoo.
  • A black-crested titmouse (Baeolophus atricristatus) at the Brown Ranch, Texas.
  • Photo: A female Colombian lesser black tarantula (Xenesthis immanis) at the Budapest Zoo.
  • Photo: A RuppellÕs parrot (Poicephalus rueppellii) at the Jurong Bird Park.
  • A western fox snake (Elaphe vulpina vulpina).
  • Staghorn coral (Acropora muricata) at Omaha's Henry Doorly Zoo and Aquarium.
  • A critically endangered (IUCN) and federally endangered Sumatran tiger (Panthera tigris ssp. sumatrae) at the Miller Park Zoo.
  • Photo: A critically endangered Javan black-winged starling (Acridotheres melanopterus) at Jakarta Natural Resource Conservation Center.
  • Photo: An Arabian pupfish (Aphanius dispar) at Aquarium Berlin.
  • Photo: A tarantula (Grammostola anthracina) from a private collection.
  • Photo: A little devil poison dart frog (Oophaga sylvatica tomate) at Balsa de los Sapos.
  • A long-snouted cutin frog (Pristimantis appendiculatus) near Mindo, Ecuador.
  • Photo: A female globed-horned chameleon (Calumma globifer) in Madagascar.
  • An Egyptian spiny-tailed lizard (Uromastyx aegyptia) at Reptile Gardens.
  • Photo: A Sumatran palm civet (Paguma lavarta leucomystax) at Tierpark Berlin.
  • A half-day-old hatchling leatherback turtle (Dermochelys coriacea) from Bioko Island. (IUCN: Critically Endangered, US: Endangered)
  • A flathead mullet (Mugil cephalus).
  • An eastern twin-spotted rattlesnake (Crotalus pricei miquihuanus) at the San Antonio Zoo, San Antonio, Texas.
  • Photo: A silver carp (Hypophthalmichthys molitrix) at the Schramm Education Center near Gretna, NE.
  • A great grey owl (Strix nebulosa nebulosa) at the New York State Zoo.
  • An endangered Forsten's (travancore) tortoise (Indotestudo forstenii) at Zoo Atlanta. This terrestrial species is from Indonesia's Sulawesi Island.
  • Photo: A Kilimanjaro mustard baboon spider (Pterinochilus chordatus) at Prague Zoo.
  • A critically endangered (IUCN) and federally endangered red wolf (Canis rufus gregoryi) at the Great Plains Zoo.
  • Picture of a white-throated capuchin (Cebus capucinus) named Buster at the Santa Fe College Teaching Zoo.
  • A critically endangered Indri (Indri indri), the worlds largest lemur, in the Analamazaotra Forest Station in Andasibe, Madagascar. This is a four year old female named Davida.
  • Photo: A Giant Asian pond turtle (Heosemys grandis) at Angkor Centre for Conservation of Biodiversity (ACCB) in Cambodia.
  • Photo: An eastern goliath stick insect (Eurycnema goliath) at the Melbourne Zoo.
  • Photo: Japanese tree frog (Hyla japonica) at the Moscow Zoo.
  • Photo: Mojave desert sidewinder (Crotalus cerastes cerastes) at the Woodland Park Zoo.
  • Photo: Benjamin, the Los Angeles Basin brush rabbit (Sylvilagus bachmani cinerascens) at the Big Bear Alpine Zoo in Big Bear Lake, CA.
  • Photo: Tokara habu pit viper (Protobothrops tokarensis) at the Saint Louis Zoo.
  • Photo: A Eurasian red squirrel (Sciurus vulgaris exalbidus) at the Miller Park Zoo.
  • Photo: West Cuban anole, Anolis bartschi, at the Plzen Zoo.
  • Photo: Large-scale loach (Paramisgurnus dabryanus) at the Tracy Fish Collection Facility near Byron, CA
  • Ring-tailed lemurs (Lemur catta) at the Lincoln Children's Zoo.
  • A gladiator frog (Hypsiboas boans) near Limon, Ecuador.
  • Portrait of male and female northern bobwhite quail (Colinus virginianus).
  • Photo: A brain coral (Platygyra pini) at the Downtown Aquarium in Denver, Colorado.
  • Photo: Pacific boa (Candoia carinata) at the Wroclaw Zoo.
  • Photo: A red and blue phase powder blue gourami (Colisa lalia) at the Fish Biodiversity Lab, Auburn University, Auburn, Alabama.
  • Cope's gray tree frog (Hyla chrysoscelis) at the Detroit Zoo.
  • Picture of a veiled chameleon (Chamaeleo calyptratus) at the Rolling Hills Wildlife Adventure.
  • Photo: A fish scale gecko (Geckolepis maculata) at the Plzen Zoo.
  • A Manaus slender-legged treefrog (Osteocephalus taurinus) at Pontificia Universidad Católica del Ecuador.
  • Baglafecht Weaver (Ploceus baglafecht reichenowi) at the Henry Doorly Zoo and Aquarium.
  • A vulnerable (IUCN) and federally endangered male mandrill (Mandrillus sphinx) at Rolling Hills Wildlife Adventure near Salina, Kansas.
  • Photo: A hingeback tortoise (Kinixys homeana) from the Rolling Hills Wildlife Adventure.
  • Photo: An endangered Iberian lynx (Lynx pardinus) at the Madrid Zoo. This is a male named Kalama, part of a breeding program for this rare cat species.
  • Little red flying fox (Pteropus scapulatus) at the Australian Bat Clinic. Bats act as pollinators and seed dispensers, however bats are in serious decline around Australia largely due to entanglement in fruit tree netting.
  • Picture of a rufous rat-kangaroo named Shorty (Aepyprymnus rufescens) at the Wild Life Sydney Zoo.
  • An Ecuador poison frog (Ameerega bilinguis) at Pontificia Universidad Católica del Ecuador.
  • Photo: A black-bellied plover or grey plover (Pluvialis squatarola), in winter plumage, at the Marathon Wild Bird Center in Marathon, Florida.
  • Scarlet macaws (Ara macao) at the Henry Doorly Zoo in Omaha, Nebraska.
  • Photo: A guina (Leopardus guigna tigrillo) whose name is Pikumche from Fauna Andina in central-south, Chile.
  • Photo: Common gallinule (Gallinula galeata) at the National Aviary of Colombia.
  • Red shiner (Cyprinella lutrensis) at Warm Springs Natural Area, Upper Muddy River, NE Clark County, Nevada.
  • Photo: Murray Banded Huntsman (Holconia murrayensis) from the Melbourne Museum
  • Photo: A gopher rockfish (Sebastes carnatus) at the Downtown Aquarium in Denver, Colorado.
  • Photo: A Southern crow (Corvus brachyrhynchos paulus) at Carolina Waterfowl Rescue.
  • Picture of an Andean goose, Chloephaga melanoptera, at Sylvan Heights Bird Park.
  • Photo: A common noctule bat (Nyctalus noctula noctula) at Centro Fauna Selvatica "Il Pettirosso".
  • Photo: A northern horse mussel (Modiolus modiolus) at the Maine State Aquarium in West Boothbay, ME.
  • Photo: A geometrid moth (with a damaged wing) on Bioko Island, Equatorial Guinea.
  • Photo: Western koel (Eudynamys scolopaceus mindanensis) at the Avilon Zoo.
  • Photo: Grayling (Thymallus thymallus) at the Loveland Living Planet Aquarium.
  • Photo: A Gambian epauletted fruit bat (Epomophorus gambianus) at the Plzen Zoo.
  • Photo: A Thayeri kingsnake (Lampropeltis mexicana thayeri) at Pet Paradise.
  • Photo: A bumblebee tarantula (Neoholothele fasciaaurinigra) from a private collection.
  • Picture of a greater fruit-eating bat (Artibeus lituratus) at the Lubee Bat Conservancy in Gainesville, Florida.
  • Photo: Savanna monitor lizard (Varanus exanthematicus) at the Denver Zoo.
  • Picture of a lesser snow goose (Chen caerulescens caerulescens) at Sylvan Heights Waterfowl Park.
  • A young western gray squirrel (Sciurus griseus) at Wildlife Images, an animal rehabilitation center near Merlin, Oregon.
  • A ruddy turnstone (Arenaria interpres).
  • Picture of a twospot rasbora (Rasbora elegans) at the Virginia Aquarium.
  • Photo: A Brazilian brown birdeater tarantula (Vitalius paranaensis) from a private collection.
  • Picture of a crane hawk (Geranospiza caerulescens) at the PanAmerican Conservation Association in Gamboa, Panama.
  • Photo: Adult antlion (Dendroleon speciosus) at Cedar Point Biological Station.
  • Photo: Antennata lionfish (Pterois antennata) at the Dallas Children's Aquarium.
  • South African bowsprit tortoise (Chersina angulata) at the Detroit Zoo.
  • Photo: Alaska Skate (Bathyraja parmifera) at the Alaska SeaLife Center in Seward, AK.
  • Photo: Blue crowned parakeet (Psittacara acuticaudatus haemorrhous) at Loro Parque Fundacion.
  • Photo: An Atlantic salmon (Salmo salar) at the Maine State Aquarium in West Boothbay, ME. This species is listed as vulnerable by IUCN.
  • Photo: Asiatic black-spined toad (Bufo melanostictus) at the Miller Park Zoo. These toads are common to the Indian subcontinent, where they wait under street lights to catch insects.
  • Photo: A bay-breasted warbler (Setophaga castanea) at the Wildlife Rehab Center of Minnesota.
  • Photo: A Serengeti topi (Damaliscus jimela), formerly known as Damaliscus lunatus jimela, at the San Antonio Zoo.
  • Photo: An Elegant Acraea (Acraea egina) in Libreville, Gabon.
  • Toady rainfrog or rusty robber frog (Strabomantis or Craugastor bufoniformis), from Central America at Zoo Atlanta.
  • Photo: Panama blonde tarantula (Psalmopoeus pulcher) at the Omaha Zoo.
  • A studio portrait of a Western ground snake, Sonora semiannulata.
  • Photo: Ets crayfish, Faxonius etnieri, at the Crayfish lab in West Liberty University in West Liberty, WV. This specimen is from the North Fork of Forked Deer River, Dyersburg, TN.
  • Photo: An olive banded millipede (Spirostreptus sp.) at Aquarium Berlin.
  • Ouachita madtoms (Noturus lachneri) at Conservation Fisheries, Knoxville, Tennessee. (IUCN: Endangered)
  • An endangered alligator lizard (Abronia graminea) at the Sedgwick County Zoo.
  • Photo: Damselfly larvae (Coenagrionidae argia) at Ash Meadows National Wildlife Refuge near Pahrump, NV.
  • Spiny turtle (Heosemys spinosa), at Zoo Atlanta.
  • Photo: Acrobat ants (Crematogaster ashmeadi) at the Urban Entomology Lab at the University of Florida at Gainesville.
  • Picture of a black-rumped waxbill (Estrilda troglodytes) from Sylvan Heights Waterfowl Park.
  • Spotted ground squirrel (Spermophilus spilosoma) at The Wildlife Center in Espanola, New Mexico.
  • Picture of a female greylag goose, Anser anser, at Sylvan Heights Bird Park.
  • Photo: A Costa Rican chevron tarantula (Psalmopoeus reduncus) from a private collection.
  • Photo: San Diego alligator lizard (Elgaria multicarinata webbii) at the Arizona-Sonora Desert Museum.
  • Plains leopard frog (Lithobates blairi) at Fenton Farm.
  • Western black-chested buzzard-eagle (Geranoaetus melanoleucus australis) at Parque Jaime Duque near Bogota, Colombia.
  • Picture of a New Zealand scaups (Aythya novaeseelandiae) at the Sylvan Heights Bird Park.
  • Picture of an greyish-throated toucanet (Aulacorhynchus prasinus) at the National Aviary breeding center in Palmar, Colombia
  • A male tiger swallowtail butterfly (Papilio glaucus).
  • Von der Decken's hornbill (Tockus deckeni) at Tampa's Lowry Park Zoo. The male has an orange beak, while the female has a black beak.
  • Photo: A zebra flatworm (Stylochus zebra) at Gulf Specimen in Panacea, Florida.
  • Photo: A pants nurse frog (Allobates femoralis) at Centro Jambatu in Quito, Ecuador.
  • An admirable grasshopper (Syrbula admirabilis) at Cedar Point Biological Station.
  • Picture of a vulnerable Dinnik's viper (Vipera dinniki) at the St. Louis Zoo.
  • Photo: A black-capped vireo (Vireo atricapilla) at Fort Hood, Texas.
  • A vulnerable blue crane or Stanley crane (Anthropoides paradiseus) at the Gladys Porter Zoo in Brownsville, Texas.
  • Picture of an endangered yellow-cheeked gibbon (Nomascus gabriellae) at the Endangered Primate Rescue Center in Cuc Phuong National Park, Vietnam.
  • Photo: A male moustached tamarin (Saguinus mystax) at the Prague Zoo.
  • Picture of a female ruddy-headed goose, Chloephaga rubidiceps, at Sylvan Heights Bird Park.
  • A coyote (Canis latrans) at the Great Plains Zoo.
  • A Southern corroboree frog (Pseudophryne corroboree) a critically endangered species at the Healesville Sanctuary in Healesville, Victoria, Australia.
  • Scarlet mormon (Papilio rumanzovia) at the San Antonio Zoo.
  • Photo: Blue crowned lorikeet (Vini australis) at Loro Parque Fundacion.
  • Photo: Golden tree snake (Dendrelaphis punctulatus) at Moonlit Sanctuary
  • A Mexican milksnake (Lampropeltis triangulum annulata) at the Gladys Porter Zoo in Brownsville, Texas.
  • Photo: A yellow-bellied mud turtle, Pelusios castanoides, at Tsimbazaza Zoo.
  • A vulnerable (IUCN) giant Asian pond turtle (Heosemys grandis) at the Phoenix Zoo.
  • Photo: A female clouded leopard (Neofelis nebulosa nebulosa) named ‘Hope’ at the Nashville Zoo. This species is listed as vulnerable.
  • Picture of a veiled chameleon (Chamaeleo calyptratus), Lincoln, Nebraska.
  • A small-mouthed salamander (Ambystoma texanum) from a private collection.
  • Photo: Perez's frog (Pelophyllax perezi) at Graham's Quinta dos Malvedos Vineyard.
  • A gladiator frog (Hypsiboas boans) near Limon, Ecuador.
  • Slackwater darter (Etheostoma boschungi), an endangered (IUCN) and federally threatened species, at Conservation Fisheries, a native stream fish breeding center. The male is colorful and much larger than the female.
  • Picture of an eastern meadowlark (Sturnella magna) from Kissimmee Prairie Preserve State Park.
  • A bluegill (Lepomis macrochirus).
  • Photo: A silverfish (Lepisma saccharina) at the Urban Entomology Lab at the University of Florida at Gainesville.
  • Photo: An Oriental pied hornbill (Anthracoceros albirostris convexus) at the Jurong Bird Park.
  • Photo: A freshwater pufferfish (Pao palembangensis) from a private collection in St. Augustine, Florida.
  • Photo: A Central American agouti, Dasyprocta punctata, at the Blank Park Zoo in Des Moines, Iowa.
  • Photo: Malie, an endangered, 12-yr-old Australian sea lion (Neophoca cinerea) at the Taronga Zoo.
  • Photo: A Los Tayos rocket frog (Hyloxalus nexipus) at Balsa de los Sapos.
  • Magpie shrikes (Corvinella melanoleuca) at the Houston Zoo.
  • Photo: A black-naped oriole (Oriolus chinensis chinensis) on Semirara Island in the Philippines.
  • Photo: Endangered bantengs (Bos javanicus) at Night Safari, Singapore.
  • Photo: A Rio Coca cochran frog (Nymphargus siren) at Balsa de los Sapos.
  • Plains leopard frog (Lithobates blairi) at Fenton Farm.
  • Chiapas beaded lizard (Heloderma horridum alvarezi) at Zoo Atlanta.
  • Photo: Juvenile Carolina madtoms (Noturus furiosus) at Conservation Fisheries in Knoxville, Tennessee.
  • Photo: A male village weaver (Ploceus cucullatus) at the Prague Zoo.
  • A half-day-old hatchling leatherback turtle (Dermochelys coriacea) from Bioko Island. (IUCN: Critically Endangered, US: Endangered)
  • Reticulated glass frog or La Palma glass frog (Hyalinobatrachium Valerioi) a species of glass frog, at Henry Vilas Zoo in Madison, WI.
  • Picture of an Allison's anole (Anolis allisoni) at the Cheyenne Mountain Zoo in Colorado Springs, CO.
  • Photo: Caterpillar of orange lacewing (Cethosia penthesilea) at Melbourne Zoo.
  • Photo: Muskovy duck (Cairina moschata) at the National Aviary of Colombia (Aviario Nacional de Colombia).
  • Photo: Two smew (Mergus albellus) at the Houston Zoo.
  • Photo: Clark's spiny lizard (Sceloporus clarkii) at Liberty Wildlife.
  • Great spangled fritillary (Speyeria cybele) from a prairie woodland near Cross Lake, Minnesota.
  • Chiricahua leopard frog (Lithobates chiricahuensis), a vulnerable (IUCN) and federally threatened species, at the Phoenix Zoo.
  • Photo: African spurred tortoise (Geochelone sulcata) at the Denver Zoo.
  • A westslope cutthroat Trout (Oncorhynchus clarki lewisi) in Noxon, Montana.
  • Photo: A female Lojana marsupial frog (Gastrotheca lojana) at Centro Jambatu in Quito, Ecuador.
  • Picture of a critically endangered white-belted black-and-white ruffed lemur (Varecia variegata subcincta) at the Plzen Zoo in the Czech Republic.
  • Photo: Great jerboa (Allactaga major) at the Moscow Zoo.
  • A female, vulnerable African elephant (Loxodonta africana) at the Cheyenne Mountain Zoo.
  • Picture of green-winged teals (Anas crecca carolinensis) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.
  • Picture of a long-billed corella (Cacatua tenuirostris) at the Healesville Sanctuary.
  • Picture of an endangered (IUCN) and federally endangered numbat (Myrmecobius fasciatus) at Healesville Sanctuary.
  • Picture of a vulnerable Antipodes Island parakeet (Cyanoramphus unicolor) at the Kiwi Birdlife Park in Queenstown, New Zealand.
  • Photo: An European hare (Lepus europaeus) at Centro Fauna Selvatica "Il Pettirosso".
  • Picture of a Neaves' Whiptail Lizard (Aspidoscelis neavesi) at Omaha's Henry Doorly Zoo.
  • Photo: South temple pit viper (Tropidolaemus philippensis) at Davao Crocodile Park.
  • Photo: A red lacewing (Cethosia biblis liacura) at Davao Butterfly House in Davao City, Philippines.
  • Photo: Wood scorpion (Cercophonius squama) at the Singapore Zoo.
  • Picture of a conspicuous angelfish (Chaetodontoplus conspicillatus) at the Dallas World Aquarium.
  • Picture of a pair of masked lapwings (Vanellus miles) at the Columbus Zoo.
  • Photo: A song thrush (Turdus philomelos philomelos) at the Plzen Zoo in the Czech Republic.
  • Photo: A critically endangered southern river terrapin (Batagur affinis) at the San Antonio Zoo.
  • A longtail salamander (Eurycea longicauda longicauda) at the Toledo Zoo, Toledo, Ohio.
  • Picture of a senegal bichir (Polypterus senegalus) at the Tulsa Zoo.
  • Picture of a prong-billed barbet (Semnornis frantzii) at the Dallas World Aquarium.
  • Photo: A male Western grey kangaroo (Macropus fuliginosus melanops) at Tierpark Berlin.
  • Two chestnut-bellied sandgrouse (Pterocles exustus exustus) at Safari Park Dvur Kralove. The female has more black markings.
  • Photo: A Salado salamander (Eurycea chisholmensis) at the Conservation Department of the San Antonio Zoo. This species is listed as vulnerable on the IUCN Red List.
  • Photo: A male boat-tailed grackle (Quiscalus major major) at Rogers Wildlife Rehabilitation in Hutchins, TX.
  • Photo: Iberian hare (Lepus granatensis granatensis) at the University of Porto in Portugal
  • Photo: A morning sunstar (Solaster dawsoni) at the Alaska SeaLife Center.
  • Photo: A critically endangered pindu (Stomatepia pindu) at L'aquarium tropical du palais de la Porte DorŽe.
  • Photo: Golden birdwing, (Troides radamanthus radamanthus), at Crocolandia in the Philippines.
  • Lun Lun the endangered (IUCN) and federally endangered giant panda (Ailuropoda melanoleuca) at Zoo Atlanta.
  • Picture of candy cane coral (Caulastrea furcata) at the Columbus Zoo.
  • Photo: Dwarf hissing cockroach (Elliptorhina chopardi) at the Budapest Zoo.
  • An eyelash viper (Bothriechis schlegelii) at Reptile Gardens.
  • An albino Burmese python (Python molurus bivittatus), at the Kansas City Zoo.
  • An endangered polka-dot poison frog (Oophaga arborea) from a private collection.
  • Picture of an African clown wrasse (Coris gaimard) at Pure Aquariums.
  • Picture of a basket star (Astrophyton muricatum) at Pure Aquariums from the Gulf Specimen Marine Lab.
  • Photo: A female Mindanao wrinkled hornbill, Rhabdotorrhinus leucocephalus, at Talarak Foundation.
  • A Texas tortoise (Gopherus berlandieri) at the Houston Zoo.
  • A long-eared owl (Asio otus tuftsi) at The Wildlife Center in Espanola, NM.
  • Photo: Thai mahseer (Tor tambroides) at Zoo Negara.
  • Photo: A smooth sun star (Solaster endeca) at the Maine State Aquarium in West Boothbay, ME.
  • Photo: Banded peacock or fatima (Anartia fatima) in Gamboa, Panama.
  • Photo: A female Chinese ring necked pheasant (Phasianus colchicus torquatus) at the Plzen Zoo.
  • Photo: A juvenile song thrush (Turdus philomelos clarkei) at Hessilhead Wildlife Rescue.
  • A cypress darter (Etheostoma proeliare) at Conservation Fisheries, a native stream fish breeding center in Knoxville. This fish is common and widespread in the southeastern U.S.
  • Vine snake (Oxybelis aeneus) at the Arizona-Sonora Desert Museum.
  • Photo: Critically endangered Devils Hole pupfish (Cyprinodon diabolis) at Ash Meadows National Wildlife Refuge.
  • Photo: An amber baboon tarantula (Harpactira cafreriana) from a private collection.
  • A yellow-fronted canary (Crithagra mozambicus mozambicus) from Chitengo Camp, Gorongosa National Park.
  • A critically endangered (IUCN) and federally endangered Philippine crocodile (Crocodylus mindorensis) at the Gladys Porter Zoo.
  • Photo: Two Belitung Island tarsiers (Cephalopachus bancanus saltator) in Jakarta, Indonesia in the care of PT. Alam Nusantara Jayatama.
  • Kenya Crested Guineafowl (Guttera pucherani) at the San Antonio Zoo.
  • A short-eared owl (Asio flammeus flammeus) at the Alaska Zoo.
  • Photo: New Mexico milksnake (Lampropeltis triangulum celaenops) at the Albuquerque BioPark Aquarium.
  • Picture of an endangered Iberian lynx (Lynx pardinus) at the Madrid Zoo.
  • Photo: A wall of Photo Ark images at the Houston Zoo.
  • Picture of a king vulture (Sarcoramphus papa) from the Gladys Porter Zoo in Brownsville, Texas.
  • Picture of a male Mountain goat (Oreamnos americanus) at the Cheyenne Mountain Zoo.
  • Photo: A Sahara aphanius (Aphanius saourensis) at Aquarium Berlin.
  • Picture of a Bullock's Oriole (Icterus bullockii) at the Sulphur Creek Nature Center.
  • Picture of a leopard skink (Ctenotus pantherinus) at the Wild Life Sydney Zoo.
  • Violet turaco (Musophaga violacea) at the Lincoln Children's Zoo.
  • Photo: A a pair of endangered gray gibbons (Hylobates muelleri muelleri) at the Miller Park Zoo.
  • A striped skunk (Mephitis mephitis).
  • Photo: Silver-striped charaxes (Charaxes lasti) at Butterfly Pavilion.
  • A tammar wallaby (Macropus eugenii) at the Lincoln Children's Zoo.
  • A red-sided curly-tailed lizard (Leiocephalus schreibersii) at the Houston Zoo.
  • Photo: Pacific signal crayfish (Pacifastacus leniusculus) at the MK Nature Center in Boise, Idaho.
  • A Dromedary camel (Camelus dromedarius) at the Gladys Porter Zoo in Brownsville, Texas.
  • A male common grackle (Quiscalus quiscula) at the San Antonio Zoo.
  • Picture of a black-footed tree rat (Mesembriomys gouldii) named Pandy at the Taronga Zoo.
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