Gerry Ellis / De Brazza's Monkey (Cercopithecus neglectus) portrait, captive animal, Woodland Park Zoo, Washington

Gerry Ellis / Solomon Island Leaf Frog (Ceratobatrachus guentheri), Woodland Park Zoo, Washington

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool to catch insects, Washington Park Zoo, Washington

Gerry Ellis / Chimpanzee (Pan troglodytes) teaching, young male to use fishing tool, Washington Park Zoo

Gerry Ellis / Jaguar (Panthera onca) portrait of young Jaguar, Woodland Park Zoo, Washington

Gerry Ellis / Jaguar (Panthera onca) fur, close-up of patterned detail, Washington Park Zoo, Portland, Oregon

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool, Washington Park Zoo

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool to feed on insects, Washington Park Zoo

Gerry Ellis / Ring-tailed Lemur (Lemur catta) group, Washington Park Zoo, Portland, Oregon, endemic to Madagascar

Gerry Ellis / Jaguar (Panthera onca) skin

Gerry Ellis / African Lion (Panthera leo) male, portrait, Washington Park Zoo, Portland, Oregon

Gerry Ellis / African Lion (Panthera leo) male, Washington Park Zoo, Portland, Oregon