Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Rookery

Photo: Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska's Pribilof Islands.

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Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska’s Pribilof Islands. If she grows any more, she will die, and her pup will then die from starvation.

Photo: After trying unsuccessfully to disentangle a female Northern fur seal at a rookery with a hook fastened to a pole, biologists try to rope her pup in order to get her to hold still long enough for them to free her from the debris that will cause her death if she grows any more.

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After trying unsuccessfully to disentangle a female Northern fur seal at a rookery with a hook fastened to a pole, biologists try to rope her pup in order to get her to hold still long enough for them to free her from the debris that will cause her death if she grows any more. (St. George Island in Alaska’s Pribilofs) Islands.

Photo: Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska's Pribilof Islands.

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Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska’s Pribilof Islands. If she grows any more, she will die, and her pup will then die from starvation.

Photo: A female Northern fur seal and her pup at a rookery on St. George Island in Alaska's Pribilof Islands.

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A female Northern fur seal and her pup at a rookery on St. George Island in Alaska’s Pribilof Islands. She’s become entangled in some debris — if she grows any more, she will die, and her pup will then die from starvation. Biologists later try to use a hook fastened to a pole to remove the debris, unsuccessfully.

Photo: Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska's Pribilof Islands.

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Biologists use a hook fastened to a pole to try and disentangle a female Northern fur seal at a rookery on St. George Island in Alaska’s Pribilof Islands. If she grows any more, she will die, and her pup will then die from starvation.

Photo: A female Northern fur seal and her pup at a rookery on St. George Island in Alaska's Pribilof Islands.

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A female Northern fur seal and her pup at a rookery on St. George Island in Alaska’s Pribilof Islands. She’s become entangled in some debris — if she grows any more, she will die, and her pup will then die from starvation. Biologists later try to use a hook fastened to a pole to remove the debris, unsuccessfully.

Photo: A female Northern fur seal and her pup at a rookery on St. George Island in Alaska's Pribilof Islands.

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A female Northern fur seal and her pup at a rookery on St. George Island in Alaska’s Pribilof Islands. She’s become entangled in some debris — if she grows any more, she will die, and her pup will then die from starvation. Biologists later try to use a hook fastened to a pole to remove the debris, unsuccessfully.

Photo: A female Northern fur seal at a rookery on St. George Island in Alaska's Pribilof Islands.

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A female Northern fur seal at a rookery on St. George Island in Alaska’s Pribilof Islands. She’s become entangled in some debris — if she grows any more, she’ll die. Biologistslater try to use a hook fastened to a pole to remove the debris, unsuccessfully.

Photo: Biologist Brian deLong reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska's Pribilof Islands.

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Biologist Brian deLong reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply in recent years due to human overfishing.

Photo: A female Northern fur seal at a rookery on St. George Island in Alaska's Pribilof Islands.

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A female Northern fur seal at a rookery on St. George Island in Alaska’s Pribilof Islands. She’s become entangled in some debris — if she grows any more, she’ll die. Biologistslater try to use a hook fastened to a pole to remove the debris, unsuccessfully.

Photo: Biologist Terry Spraker looks out over a Northern fur sealrookery on St. George Island in Alaska's Pribilof Islands.

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Biologist Terry Spraker looks out over a Northern fur sealrookery on St. George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply inrecent years due to human overfishing.

Photo: Biologist Brian deLong reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska's Pribilof Islands.

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Biologist Brian deLong reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply in recent years due to human overfishing.

Photo: Biologist Terry Spraker (background) and his assistant Brian deLong reach into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska's Pribilof Islands.

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Biologist Terry Spraker (background) and his assistant Brian deLong reach into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St. George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply in recent years due to human overfishing.

Photo: Biologist Terry Spraker and his assistant Brian deLong examine a female Northern fur seal killed by two males in a rookery on St. George Island in Alaska's Pribilof Islands.

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Biologist Terry Spraker and his assistant Brian deLong examine a female Northern fur seal killed by two males in a rookery on St. George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply in recent years due to human overfishing.

Photo: Biologist Terry Spraker reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St.George Island in Alaska's Pribilof Islands.

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Biologist Terry Spraker reaches into a Northern fur seal rookery with a pole to retrieve a dead pup for necropsy on St.George Island in Alaska’s Pribilof Islands. Both seal and sea lion populations have declined sharply in recent years due to human overfishing.

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seal sunning itself at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seal sunning itself at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Male and female Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Male and female Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seal and pup at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seal and pup at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seal at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: A Northern fur seal rushes the camera at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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A Northern fur seal rushes the camera at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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Northern fur seals at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: A Northern fur seal rushes the camera at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

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A Northern fur seal rushes the camera at a rookery on St. George Island in the Pribilofs (Alaska.) The species is listed as vulnerable on the IUCN Red List.

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seal (Vulnerable Red List status) with discarded rope caught around its neck at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seal (Vulnerable Red List status) with discarded rope caught around its neck at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: A scientist studies Northern fur seals (Vulnerable Red Liststatus) at a rookery on St. George Island in the Pribilofs (Alaska).

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A scientist studies Northern fur seals (Vulnerable Red Liststatus) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seals (Vulnerable Red List status) and shorebirds at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) and shorebirds at a rookery on St. George Island in the Pribilofs (Alaska).

Photo: Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (Alaska).

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Northern fur seals (Vulnerable Red List status) at a rookery on St. George Island in the Pribilofs (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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