A giant monkey frog (Phyllomedusa bicolor) at the Omaha’s Henry Doorly Zoo.
A jade gliding frog (Rhacophorus prominanus) at the Houston Zoo.
A common tree frog (Polypedates leucomystax) at the Singapore Zoo.
An endangered Red Hills salamander (Phaeognathus hubrichti) at the Cincinnati Zoo.
A Jabal Mousa fire salamander (Salamandra algira tingitana) at the Plzen Zoo in the Czech Republic.
A naked mole rat (Heterocephalus glaber) at the Lincoln Children’s Zoo.
A golden poison dart frog (Phyllobates terribilis) at Rolling Hills Wildlife Adventure.
A four-month old oncilla (Leopardus tigrinus pardinoides) at Huachipa Zoo in Lima, Peru. This species is listed as vulnerable by IUCN.
Joel Sartore photographs a Chinese water dragon, Physignathus cocincinus, at the Lincoln Children’s Zoo in Lincoln, NE.
Behind the scenes look at a National Geographic Photo Ark shoot of American flamingos (Phoenicopterus ruber) at the Lincoln Children’s Zoo in Lincoln, NE.
A hippopotamus bares its teeth at the Sedgwick County Zoo.
A California giant sea cucumber (Apostichopus californicus) at Riverbanks Zoo and Garden.
A black boring sea urchin (Echinometra lucunter) at Riverbanks Zoo and Garden
An Indo-Pacific borer urchin (Echinometra mathaei) at Riverbanks Zoo and Garden.
A smooth flower coral (Eusmilia fastigiata) at Riverbanks Zoo and Garden.
A lightfoot snail (Lithopoma tectum) at Riverbanks Zoo and Garden.
A maze coral (Meandrina meandrites) at Riverbanks Zoo and Garden.
An endangered mountainous star coral (Orbicella faveolata) at Riverbanks Zoo and Garden.
A spiny flower coral (Mussa angulosa) at Riverbanks Zoo and Garden.
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