Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Net

Photo: Trapping and banding the federally endangered Florida grasshopper sparrow at Kissimmee Prairie Preserve State Park.

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Trapping and banding the federally endangered Florida grasshopper sparrow at Kissimmee Prairie Preserve State Park.

Photo: Zookeepers capture a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China.

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Zookeepers capture a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers capture a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China.

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Zookeepers capture a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: A critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) has a check up at the Suzhou Zoo in China.

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A critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) has a check up at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers search an enclosure for a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China.

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Zookeepers search an enclosure for a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Media crowds around a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China.

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Media crowds around a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China.

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Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China.

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Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers net a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China.

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Zookeepers net a critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

Photo: Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China.

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Zookeepers search for the critically endangered Yangtze giant softshell turtle (Rafetus swinhoei) in an enclosure at the Suzhou Zoo in China. Both Yangtze turtles held at this facility are over 100 years old, if biologist can’t get this species to breed soon, the species will become extinct.

African black-headed oriole (Oriolus larvatus) collected at Chitengo Camp in Gorongosa National Park in Mozambique, Africa.

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African black-headed oriole (Oriolus larvatus) collected at Chitengo Camp in Gorongosa National Park in Mozambique, Africa.

An African black-headed oriole (Oriolus larvatus) collected at Chitengo Camp in Gorongosa National Park in Mozambique, Africa.

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An African black-headed oriole (Oriolus larvatus) collected at Chitengo Camp in Gorongosa National Park in Mozambique, Africa.

Olive sunbird (Cyanomitra olivacea) collected from the Mt. Gorongosa area in Mozambique, Africa.

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Olive sunbird (Cyanomitra olivacea) collected from the Mt. Gorongosa area in Mozambique, Africa.

Photo: "Moth Night" at Spring Creek Prairie near Denton, NE.

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“Moth Night” at Spring Creek Prairie near Denton, NE.

Photo: "Moth Night" at Spring Creek Prairie near Denton, NE.

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“Moth Night” at Spring Creek Prairie near Denton, NE.

Photo: A fishing village along the shore of Lake Albert, where locals have started sewing their mosquito netting together to literally strain the lake of the last of the fish here.

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A fishing village along the shore of Lake Albert, where locals have started sewing their mosquito netting together to literally strain the lake of the last of the fish here. All they’re getting are minnows at this point.

Photo: Scouting Mount Gorongosa in advance of the bioblitz, E. O. Wilson examines the insects caught in a net he swept through the grass.

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Scouting Mount Gorongosa in advance of the bioblitz, E. O. Wilson examines the insects caught in a net he swept through the grass.

Photo: Local boys collect frogs and dragonflies around Murombodzi waterfall on Mount Gorongosa during a 2011 bioblitz- a two-hour sampling of its wildlife.

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Local boys collect frogs and dragonflies around Murombodzi waterfall on Mount Gorongosa during a 2011 bioblitz- a two-hour sampling of its wildlife.

Photo: Endangered freshwater mussels.

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Endangered freshwater mussels. Mussels are the most endangered fauna species, with 50% of them now either threatened, endangered, or extinct.

A Department of Game and Fish employee checks on a federally endangered Socorro isopod (Thermosphaeroma thermophilum).

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A Department of Game and Fish employee checks on a federally endangered Socorro isopod (Thermosphaeroma thermophilum).

An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

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An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

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An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

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An entomologist scouts for El Segundo flower-loving fly (Rhaphiomidas terminatus terminatus). This insect was thought to be extinct since the end of the 1960s but a small remnant population of less than 100 individuals was discovered in the early 2000s.

Photo: Retirees frolic in a pool at the Fun N Sun Resort in San Benito, one of many border communities that attract "winter Texans" from the north every fall.

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Retirees frolic in a pool at the Fun N Sun Resort in San Benito, one of many border communities that attract “winter Texans” from the north every fall.

Bull trout (Salvelinus confluentus) caught in fishing nets in Lake Pend Oreille, Idaho. (IUCN: Vulnerable; US: Federally threatened)

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Bull trout (Salvelinus confluentus) caught in fishing nets in Lake Pend Oreille, Idaho. (IUCN: Vulnerable; US: Federally threatened)

Photo: A lake trout (Salvelinus namaycush) caught in a net by fishermen in Lake Pend Oreille, Idaho.

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A lake trout (Salvelinus namaycush) caught in a net by fishermen in Lake Pend Oreille, Idaho.

A female bobolink (Dolichonyx oryzivorus) is caught by biologists using a mist net, near Wood River, Nebraska. Avian ecologists trap and put tiny geolocators, which track sun intensity as well as sunrise and sunset, on male bobolinks. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds' migratory route. The species winters in South America, but little is known of its specific route.

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A female bobolink (Dolichonyx oryzivorus) is caught by biologists using a mist net, near Wood River, Nebraska. Avian ecologists trap and put tiny geolocators, which track sun intensity as well as sunrise and sunset, on male bobolinks. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds’ migratory route. The species winters in South America, but little is known of its specific route.

Photo: Cowbirds (Molothrus sp.) that were caught in traps set for them at Fort Hood Army Base near Kileen, TX. Of these cowbirds, the females will be killed and the males will be kept to lure other birds.

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Cowbirds (Molothrus sp.) that were caught in traps set for them at Fort Hood Army Base near Kileen, TX. Of these cowbirds, the females will be killed and the males will be kept to lure other birds. The eradication of cowbirds has been going on for awhile here in an effort to study the effect of their parasitism on endangered birds like the black-capped vireo and golden-cheeked warbler.

Biologists capture a male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska. They will put tiny geolocators, which track sun intensity as well as sunrise and sunset, the birds' backs. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds' migratory route. The species winters in South America, but little is known of its specific route.

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Biologists capture a male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska. They will put tiny geolocators, which track sun intensity as well as sunrise and sunset, the birds’ backs. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds’ migratory route. The species winters in South America, but little is known of its specific route.

Biologists capture a male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska. They will put tiny geolocators, which track sun intensity as well as sunrise and sunset, the birds' backs. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds' migratory route. The species winters in South America, but little is known of its specific route.

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Biologists capture a male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska. They will put tiny geolocators, which track sun intensity as well as sunrise and sunset, the birds’ backs. When the birds are recaptured (months from now) and the data is downloaded and used to calculate the birds’ migratory route. The species winters in South America, but little is known of its specific route.

An endangered (IUCN and US) golden-cheeked warbler (Dendroica chrysoparia) caught in a mist net by scientists from the Nature Conservancy. Scientists net and band golden-cheeked warblers at Fort Hood in Killeen, Texas.

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An endangered (IUCN and US) golden-cheeked warbler (Dendroica chrysoparia) caught in a mist net by scientists from the Nature Conservancy. Scientists net and band golden-cheeked warblers at Fort Hood in Killeen, Texas.

An endangered (IUCN and US) golden-cheeked warbler (Dendroica chrysoparia) caught in a mist net by scientists from the Nature Conservancy. Scientists net and band golden-cheeked warblers at Fort Hood in Killeen, Texas.

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An endangered (IUCN and US) golden-cheeked warbler (Dendroica chrysoparia) caught in a mist net by scientists from the Nature Conservancy. Scientists net and band golden-cheeked warblers at Fort Hood in Killeen, Texas.

Photo: Workers sift through sand to separate the oil on the beaches of Dauphin Island, Alabama.

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Workers sift through sand to separate the oil on the beaches of Dauphin Island, Alabama.

Photo: A biologist working for the National Parks Service pulls up a catch of introduced (non-native) trout at the Sixty Lake Basin of King's Canyon National Park, Nevada.

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A biologist working for the National Parks Service pulls up a catch of introduced (non-native) trout at the Sixty Lake Basin of King’s Canyon National Park, Nevada.

Photo: A biologist working for the National Parks Service collects introduced (non-native) trout at the Sixty Lake Basin of King's Canyon National Park, Nevada.

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A biologist working for the National Parks Service collects introduced (non-native) trout at the Sixty Lake Basin of King’s Canyon National Park, Nevada.

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