Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: Calf

An endangered Indian rhinoceros female with calf (Rhinoceros unicornis) at the Fort Worth Zoo.

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An endangered Indian rhinoceros female with calf (Rhinoceros unicornis) at the Fort Worth Zoo.

The back of an endangered Indian rhinoceros female and calf (Rhinoceros unicornis) at the Fort Worth Zoo.

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The back of an endangered Indian rhinoceros female with calf (Rhinoceros unicornis) at the Fort Worth Zoo.

Picture of Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Picture of Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Picture of Ralph, an endangered 6 month old baby Pygmy hippopotamus (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Photo: A mother European bison (Bison bonasus) and her calf at Parco Natura Viva in Bussolengo, Italy.

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A mother European bison (Bison bonasus) and her calf at Parco Natura Viva in Bussolengo, Italy.

Endangered (IUCN) and federally endangered five-month-old mountain tapir (Tapirus pinchaque) at the Cali Zoo in Colombia.

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Endangered (IUCN) and federally endangered five-month-old mountain tapir (Tapirus pinchaque) at the Cali Zoo in Colombia.

Endangered (IUCN) and federally endangered five-month-old mountain tapir (Tapirus pinchaque) at the Cali Zoo in Colombia.

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Endangered (IUCN) and federally endangered five-month-old mountain tapir (Tapirus pinchaque) at the Cali Zoo in Colombia.

A greater kudu (Tragelaphus strepsiceros) at the Gladys Porter Zoo in Brownsville, Texas.

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A greater kudu (Tragelaphus strepsiceros) at the Gladys Porter Zoo in Brownsville, Texas.

A greater kudu (Tragelaphus strepsiceros) and her calf at the Gladys Porter Zoo in Brownsville, Texas.

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A greater kudu (Tragelaphus strepsiceros) and her calf at the Gladys Porter Zoo in Brownsville, Texas.

A greater kudu (Tragelaphus strepsiceros) and her calf at the Gladys Porter Zoo in Brownsville, Texas.

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A greater kudu (Tragelaphus strepsiceros) and her calf at the Gladys Porter Zoo in Brownsville, Texas.

Picture of Ralph an endangered 6 month old baby Pygmy hippopotamus (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Picture of Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Picture of Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

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Ralph, an endangered 6 month old baby Pygmy hippopotamus and his mother, Chomel (Choeropsis liberiensis) at Omaha Henry Doorly Zoo.

Photo: A teenager and her calf took top honors at the Indiana State Fair.

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A teenager and her calf took top honors at the Indiana State Fair.

Photo: A USFWS employee, stands over a calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle.

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A USFWS employee, stands over a calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle. Defenders of Wildlife actually reimburses ranchers for any cattle loss to wolves in Montana.

Photo: A USFWS employee, stands over a calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle.

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A USFWS employee, stands over a calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle. Defenders of Wildlife actually reimburses ranchers for any cattle loss to wolves in Montana.

Photo: A calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle.

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A calf that was killed by a wolf pack near Red Deer, MT. Wolves very seldom kill cattle. Defenders of Wildlife actually reimburses ranchers for any cattle loss to wolves in Montana.

Four juvenile condors, (Gymnogyps californianus), feed on a partial dairy calf provided for them by biologists at Los Padres National Forest in California. These one-year-old birds are the first to be released into the wild after being reared by their own parents, rather than puppets. (IUCN: Critically endangered, US: Endangered)

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Four juvenile condors, (Gymnogyps californianus), feed on a partial dairy calf provided for them by biologists at Los Padres National Forest in California. These one-year-old birds are the first to be released into the wild after being reared by their own parents, rather than puppets. (IUCN: Critically endangered, US: Endangered)

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Bison mother and calf graze at Tallgrass Prairie Preserve near Pawhuska, Oklahoma.

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Bison mother and calf graze at Tallgrass Prairie Preserve near Pawhuska, Oklahoma.

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino, with her three-week-old calf, at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of this calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

Photo: Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi's calf is a tremendous event for the conservation of the species.

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Emi, a female Sumatran rhino at the Cincinnati Zoo. There are only nine Sumatran rhinos in captivity, so the birth of Emi’s calf is a tremendous event for the conservation of the species. Sumatran rhinos are being poached in the wild so quickly that biologists fear they could go extinct in the wild within the next 20 years.

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