Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Tracking

Photo: A juvenile caught by biologists.

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A juvenile caught by biologists. They hope to track its movements through Alaskan oilfields.

Photo: A juvenile caught by biologists.

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A juvenile caught by biologists. They hope to track its movements through Alaskan oilfields.

Photo: Dr. Ludwig Siefert and senior research assistant James Kalyewa use a wide range of monitoring techniques to track the movement of large predators in Uganda.

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Dr. Ludwig Siefert and senior research assistant James Kalyewa use a wide range of monitoring techniques to track the movement of large predators in Uganda.

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.

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

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Experts check for the signals of radio collared lions.

Tracking mountain gorillas in Bwindi Impenetrable Forest.

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Tracking mountain gorillas in Bwindi Impenetrable Forest.

Photo: A biologist radio collars a lioness in the Ishasha Section of Queen Elizabeth National Park.

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A biologist radio collars a lioness in the Ishasha Section of Queen Elizabeth National Park.

Photo: A fisheries technician for dam owner Avista, uses a radio antenna to track tagged bull trout in a stream that feeds into Noxon Reservoir.

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A fisheries technician for dam owner Avista, uses a radio antenna to track tagged bull trout in a stream that feeds into Noxon Reservoir. Biologists track a handful of tagged fish daily to try and learn about their migratory movements, which a series of dams on the nearby Clark Fork River have severely impeded.

Biologists tag a male bobolink (Dolichonyx oryzivorus) in 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 tag a male bobolink (Dolichonyx oryzivorus) in 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.

A male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska.

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A male bobolink (Dolichonyx oryzivorus) near Wood River, Nebraska.

A biologist holds a male bobolink (Dolichonyx oryzivorus), captured for a study 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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A biologist holds a male bobolink (Dolichonyx oryzivorus), captured for a study 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.

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.

A piping plover (Charadrius melodus). (US: Endangered)

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A piping plover (Charadrius melodus). (US: Endangered)

Photo: Volunteer Jon Thaxton with a Florida scrub-jay (threatened) at the Mary Thaxton preserve in Oscar Scherer State Park near Osprey, FL.

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Volunteer Jon Thaxton with a Florida scrub-jay (threatened) at the Mary Thaxton preserve in Oscar Scherer State Park near Osprey, FL.

Photo: A juvenile raven caught by biologists tries to fly away.

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A juvenile raven caught by biologists tries to fly away. Biologists hope to track its movements through Alaskan oilfields.

Photo: Biologists tie down and net juvenile ravens in order to track their movements among Alaskan oil fields.

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Biologists tie down and net juvenile ravens in order to track their movements among Alaskan oil fields.

Photo: Volunteer Jon Thaxton with a Florida scrub-jay (threatened) at the Mary Thaxton preserve in Oscar Scherer State Park near Osprey, FL.

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Volunteer Jon Thaxton with a Florida scrub-jay (threatened) at the Mary Thaxton preserve in Oscar Scherer State Park near Osprey, FL.

Photo: Grizzly asleep in cotton flower on Alaska's north slope.

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Grizzly asleep in cotton flower on Alaska’s north slope. The bear was tranquilized by biologists so they could radio collar it.

Photo: Biologists capture endangered Florida manatees to do blood work and tagging at Apollo Beach, Florida.

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Biologists capture endangered Florida manatees to do blood work and tagging at Apollo Beach, Florida.

Photo: Biologists capture endangered Florida manatees to do blood work and tagging at Apollo Beach, Florida.

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Biologists capture endangered Florida manatees to do blood work and tagging at Apollo Beach, Florida.

Photo: Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

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Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

Photo: Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

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Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

Photo: Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

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Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

Photo: Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

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Musk oxen are surveyed by helicopter at Nunivak Island, part of the Yukon Delta NWR, Alaska.

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

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