Sumatran Orangutan | Birmingham Zoo
Do Gorillas Even Belong in Zoos? Harambe's Death Spurs Debate - The New York Times
Center For Great Apes Reviews and Ratings | Wauchula, FL | Donate, Volunteer, Review | GreatNonprofits
Great Apes - Utah's Hogle Zoo
Gorilla - Wikipedia
Primate - Growth and longevity | Britannica
Chimpanzee Lifespan: How Long Do They Live? - AZ Animals
APE HAVEN - Bonita Springs Florida Weekly
About Chimpanzees - Center for Great Apes
Chimpanzee Lifespan & Life Cycle | How Long Do Chimps Live? - Video & Lesson Transcript | Study.com
Western Lowland Gorilla - Zoo Atlanta
Gorilla Lifespan: How Long Do Gorillas Live? - AZ Animals
Chimpanzee, facts and photos
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Bonobo | San Diego Zoo Animals & Plants
Meet one of the oldest chimpanzees in captivity | CNN
Primate - Growth and longevity | Britannica
Chimpanzee - Wikipedia
About Chimpanzees - Center for Great Apes
Do Gorillas Even Belong in Zoos? Harambe's Death Spurs Debate - The New York Times
How old is old? - Project Chimps
Western Lowland Gorilla - San Francisco Zoo & Gardens
Orangutan | Definition, Habitat, Height, Weight, Lifespan, Scientific Names, & Facts | Britannica
Orangutans back in Mysuru zoo after four-and-half decades | Mysuru News - Times of India
