Dear Friends: We are still open for business, but it might take longer to fill your orders and requests as we have shifted to minimal staffing as a precaution against COVID-19. We appreciate your patience.

Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Study

Photo: A hibernating female yellow-bellied marmot (Marmota flaviventris) at the hibernation study lab of Dr. Greg Florant at Colorado State University.

Photo

ONA007-00185

A hibernating female yellow-bellied marmot (Marmota flaviventris) at the hibernation study lab of Dr. Greg Florant at Colorado State University.

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

Photo

BIR053-00139

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

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

Photo

BIR053-00140

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

A mountain wagtail, also known as a long-tailed wagtail (Motacilla clara) in Gorongosa National Park in Mozambique, Africa.

Photo

BIR053-00142

A mountain wagtail, also known as a long-tailed wagtail (Motacilla clara) in Gorongosa National Park in Mozambique, Africa.

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

Photo

BIR053-00130

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

A brown rat (Rattus norvegicus) trapped by a research team studying rodents for a movement tracking study in Queensland, Australia.

Photo

PEO020-00136

A brown rat (Rattus norvegicus) trapped by a research team studying rodents for a movement tracking study in Queensland, Australia.

A yellow-footed antechinus (Antechinus flavipes) trapped by a research team for a movement tracking study near Petrie, Queensland.

Photo

ANI012-00261

A yellow-footed antechinus (Antechinus flavipes) trapped by a research team for a movement tracking study near Petrie, Queensland.

A northern brown bandicoot (Isoodon macrourus), trapped by a research team for a movement tracking study near Petrie, Queensland.

Photo

ANI012-00265

A northern brown bandicoot (Isoodon macrourus), trapped by a research team for a movement tracking study near Petrie, Queensland.

A black rat (Rattus rattus) captured during a tracking study near Petrie, Queensland.

Photo

ANI012-00260

A black rat (Rattus rattus) captured during a tracking study near Petrie, Queensland.

Photo: Biologist scout for federally-endangered birds at Kissemmee Prarie State Park.

Photo

ONA005-00002

Biologist scout for federally-endangered birds at Kissemmee Prarie State Park.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00243

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00244

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00245

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00235

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00236

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00237

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00238

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00239

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00240

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00241

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00242

Red knot (Calidris canutus), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus ssp. rufa), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00187

Red knot (Calidris canutus ssp. rufa), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Red knot (Calidris canutus ssp. rufa), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it's northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo

ESA001-00186

Red knot (Calidris canutus ssp. rufa), a candidate species for listing due to a rapid decline in population. The bird is dependent on one food during it’s northward migration: horseshoe crab eggs. Overfishing of the crabs has led a dramatic the decline of both knots and crabs. This bird was captured as part of a banding study by the Delaware Bay Shorebird Project.

Photo: A biologist holds a bat that was killed by a wind turbine on a wind farm in southwest Pennsylvania.

Photo

ANI082-00087

A biologist holds a bat that was killed by a wind turbine on a wind farm in southwest Pennsylvania. Biologists calculate that an average of 32 bats and nearly 5 birds are killed per turbine per season here, having a deadly effect on migrating wildlife.

A road-killed bobcat (Lynx rufus) that has been placed along a highway near the Santa Anna NWR.

Photo

ANI082-00059

A road-killed bobcat (Lynx rufus) that has been placed along a highway near the Santa Anna NWR. USFWS biologists are conducting a study to determine how often passers will to pick up and take a dead bobcat, which often is just a few minutes. This may be skewing biologist’s road kill statistics.

Photo: Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00019

Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00018

Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00017

Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It's the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can't figure out how this animal maintains a flat body temperature for all those months just above freezing. "You could put people into hibernation for space trips if you could understand it better," said Franziska 'Fran' Kohl, one of the biologists here. "They also show symptoms of Alzheimers during hibernation." She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo

ANI072-00016

Hibernating Arctic ground squirrels (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00015

Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00014

Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks.

Photo

ANI072-00013

Portrait of a hibernating Arctic ground squirrel (Spermopilus parryii) at the University of Alaska at Fairbanks. This animal is the grand champion of all hibernators. It’s the only mammal that can drop its body temperature to below freezing. They hibernate for seven months. Females go in first, in August. Males follow a month later. They come out again to feed on tundra plants in May. Biologists at UAF have been studying the animal for 20 years, but still can’t figure out how this animal maintains a flat body temperature for all those months just above freezing. “You could put people into hibernation for space trips if you could understand it better,” said Franziska ‘Fran’ Kohl, one of the biologists here. “They also show symptoms of Alzheimers during hibernation.” She added that traumatic head injuries heal when in hibernation, another thing scientists are trying to figure out.

Photo: A 10-year-old girl works on a computer in a dark room.

Photo

PEO019-00147

A 10-year-old girl works on a computer in a dark room.

Photo: Dead Sandhill cranes at Rowe Audubon Sactuary near Kearney, Nebraska

Photo

BIR003-00407

Dead Sandhill cranes at Rowe Audubon Sactuary near Kearney, Nebraska

Photo: Researchers use binoculars to search for peregrine falcon chicks along the Colville River.

Photo

BIR021-00059

Researchers use binoculars to search for peregrine falcon chicks along the Colville River. The researchers band the chicks in order to track what habitat the birds are using repeatedly and how old the birds are when they return to the nest.

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

Speaking Engagements

Joel is a popular keynote speaker with conservation, corporate, and civic groups.

Hire him to entertain and inspire your audience.

Book Joel To Speak

The Photo Ark

Joel is the founder of the Photo Ark, a groundbreaking effort to document every species in captivity before it’s too late.

Explore the Photo Ark

Visit Our Store

Every purchase goes directly to support our mission: getting the public to care and helping to save species from extinction.

Help Us Build the Ark