Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Biologists

Photo: Experts check for the signals of radio collared lions.

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Experts check for the signals of radio collared lions.

Photo: A crew tranquilizes and radio collars a lion for monitoring.

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A crew tranquilizes and radio collars a lion for monitoring.

Photo: A crew tranquilizes and radio collars a lion for monitoring.

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A crew tranquilizes and radio collars a lion for monitoring.

Biologists work in the pouring rain, searching for a rare fish, the smoky madtom (Noturus baileyi) ( IUCN: Critically endangered, US: Endangered) in Abrams Creek, TN.

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Biologists work in the pouring rain, searching for a rare fish, the smoky madtom (Noturus baileyi) ( IUCN: Critically endangered, US: Endangered) in Abrams Creek, TN.

Photo: Biologists from Cornell eat their lunch standing while searching for the ivory billed woodpecker in the White River National Wildlife Refuge in St. Charles, Arkansas.

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Biologists from Cornell eat their lunch standing while searching for the ivory billed woodpecker in the White River National Wildlife Refuge in St. Charles, Arkansas.

Photo: A writer and a researcher organize extinct frog specimens at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito's Catholic University, Ecuador.

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A writer and a researcher organize extinct frog specimens at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito’s Catholic University, Ecuador.

Photo: A scientist holds a captive frog at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito's Catholic University, Ecuador.

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A scientist holds a captive frog at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito’s Catholic University, Ecuador.

Photo: A scientist holds a captive frog at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito's Catholic University, Ecuador.

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A scientist holds a captive frog at the breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito’s Catholic University, Ecuador.

Photo: Scientists examine frogs at the captive breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito's Catholic University, Ecuador.

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Scientists examine frogs at the captive breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito’s Catholic University, Ecuador.

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

Biologists in King's Canyon National Park's Sixty Lake Basin, Nevada.

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Biologists in King’s Canyon National Park’s Sixty Lake Basin, Nevada.

A biologist scales rocks in King's Canyon National Park's Sixty Lake Basin, Nevada.

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A biologist scales rocks in King’s Canyon National Park’s Sixty Lake Basin, Nevada.

Biologists in King's Canyon National Park's Sixty Lake Basin, Nevada.

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Biologists in King’s Canyon National Park’s Sixty Lake Basin, Nevada.

Photo: A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

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A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

Photo: A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

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A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

Two men look over a spring-fed pool containing Noel's amphipod at Bitter Lake National Wildlife Refuge.

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Two men look over a spring-fed pool containing Noel’s amphipod at Bitter Lake National Wildlife Refuge.

A critically endangered (IUCN) and federally endangered pallid sturgeon (Scaphirhynchus albus) is photographed getting measured by a fish crew with the Missouri Dept. of Conservation. This crew is surveying fish populations in the Missouri River near Atchinson, Kansas.

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A critically endangered (IUCN) and federally endangered pallid sturgeon (Scaphirhynchus albus) is photographed getting measured by a fish crew with the Missouri Dept. of Conservation. This crew is surveying fish populations in the Missouri River near Atchinson, Kansas.

The staff of Conservation Fisheries in Knoxville, Tennessee, studies, tags and fin clips two examples of the rarest fish in the United States, the Conasauga logperch (Percina jenkinsi). These fish are part of "The Desparate Dozen", a list of critically imperilled fish here in the southeast. (IUCN: Vulnerable; US: Endangered)

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The staff of Conservation Fisheries in Knoxville, Tennessee, studies, tags and fin clips two examples of the rarest fish in the United States, the Conasauga logperch (Percina jenkinsi). These fish are part of “The Desparate Dozen”, a list of critically imperilled fish here in the southeast. (IUCN: Vulnerable; US: Endangered)

Biologists use wet suits and snorkels to look for the critically endangered (IUCN) and federally endangered smoky madtom (Noturus baileyi) in Abrams Creek.

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Biologists use wet suits and snorkels to look for the critically endangered (IUCN) and federally endangered smoky madtom (Noturus baileyi) in Abrams Creek.

Photo: The Bonneville Dam's fish collection facility.

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The Bonneville Dam’s fish collection facility. Salmon are sorted from the Columbia River and worked here by biologists.

Photo: Buffalo, Wyoming's Bureau of Land Management employees do an "on-site" inspection of several private and public land site on which the BLM has the mineral rights but lease them out.

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Buffalo, Wyoming’s Bureau of Land Management employees do an “on-site” inspection of several private and public land site on which the BLM has the mineral rights but lease them out. “On-sites” are a formal step in which land owners, energy interests and BLM biologists, engineers and others inspect an area that is about the be bulldozed and developed or drilled.

Photo: A wild Canada goose (Branta canadensis) wears an ID tag placed on its neck by biologists.

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A wild Canada goose (Branta canadensis) wears an ID tag placed on its neck by biologists.

Photo: At the Eagle Fish Hatchery in Idaho, biologists take blood and eggs from the nearly-extinct snake River Sockeye salmon.

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At the Eagle Fish Hatchery in Idaho, biologists take blood and eggs from the nearly-extinct snake River Sockeye salmon.

Photo: At the Eagle Fish Hatchery in Idaho, biologists take blood and eggs from the nearly-extinct snake River Sockeye salmon.

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At the Eagle Fish Hatchery in Idaho, biologists take blood and eggs from the nearly-extinct snake River Sockeye salmon.

Photo: An endangered black-footed ferret being released from a captive breeding program.

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An endangered black-footed ferret being released from a captive breeding program. (UL Bend NWR, MT.)

Photo: An endangered black-footed ferret being released from a captive breeding program.

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An endangered black-footed ferret being released from a captive breeding program. (UL Bend NWR, MT.)

Photo: Julie Jensen Director of Marketing | WVC O: 866.800.7326 | D: 702.443.9249 | E: j.jensen@wvc.org

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