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National Zoo and Conservation Biology Institute

It's easy to spot the difference between Karl and Karoline (even without Karl’s beak). Karoline is smaller and has a blue and black throat sack. Like other male Abyssinian ground hornbills, Karl has a red and blue throat sack.

When Karl Met Karoline

Scimitar Horned Oryx

Goats and Gazelles and Oryx, Oh My! How Wildlife Veterinarians Treat (Almost) All Species

As two orangutan infants tussled in the trees, curator of primates Meredith Bastian and primate keeper Alex Reddy looked on in awe. Over the summer, they traveled to Central Kalimantan in Indonesian Borneo to follow these great apes in their native habitat.

Primate Diary: Observing Orangutans in the Wild

A bison crosses a coulee (a landform shaped by water drainage) during a freezing spring morning.

Studying Animals in Extreme Landscapes

A tapir (Tapirus terrestris) caught on camera in Peru's Amazonian rainforest.

Eyes and Ears on the Amazon Rainforest

When animals are anesthetized, veterinarians cover their eyes to minimize visual stimulation. In this picture, veterinary technician Lisa Ware is administering fluids to help ensure a smooth recovery from anesthesia.

Tracking Tapirs: An Expedition in Ecuador

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