Of the same character is his "Ourang-Outangs" and "Borneo Savage" of 1895, a commission from the Paris Museum of Natural History.
His book Among Orangutans: Red Apes and the Rise of Human Culture tells the story of his discovery of a group of orangutans in northern Sumatra and the challenge their tool use and sociality pose to theories of primatology and the insights they offer into key moments in human evolution.
Primates at the zoo include orangutan, white-handed gibbon, black-handed spider monkey, black-and-white ruffed lemur, ringtailed lemur, crowned lemur, and cottontop tamarin.
Elephants, whales, manatees, sacred ibis, cranes, eagles, gyrfalcons, Rhinoceros Hornbills, cheetahs, leopards, African wild dogs (Lycaon pictus), caracals, baboons, eland, meerkats, gibbons, orangutans, penguins, pandas, polar bears, lions, giant Pacific manta rays, and saltwater crocodiles are among the animals he has filmed and photographed.
Large mammals characteristic of Indomalaya include the leopard, tigers, water buffalos, Asian Elephant, Indian Rhinoceros, Javan Rhinoceros, Malayan Tapir, orangutans, and gibbons.
Ken Allen (1971–2000), name given to a Bornean orangutan at the San Diego Zoo
The comic also included stories starring other characters, such as Elmer the Elk, Orry the Orangutan, and the porcine Stuffy Derma.
Melincourt (first published 1817) by the English author Thomas Love Peacock has an orangutan called Sir Oran Haut-Ton, who is put forward as a candidate for election as a member of parliament.
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In the Futurama episode The Problem with Popplers, Zap Brannigan fooled aliens into eating an orangutan in order to save Leela.
In Cryptozoology, the shojo is often referred to as xing-xing and is believed to be a mainland orangutan.
His second cousin on his maternal Irish side was Eddie Rabbitt, the Nashville country music star whose song "Kentucky Rain" was a hit for Elvis Presley and whose song "Every Which Way But Loose" was the theme tune for a film starring Clint Eastwood and an orangutan.
NHNZ filmed the Sumatran orangutan for its show Wild Asia: In the Realm of the Red Ape; it showed one of them using a simple tool, a twig, to pry food from difficult places.
Among the animals in this exhibit are Malayan tigers, oriental small-clawed otters, orangutans, siamangs, Northern white-cheeked gibbons, Malayan tapirs, binturongs, rhinoceros hornbills, fairy-bluebirds, azure-winged magpies, and chestnut-breasted malkoha.
In one episode of Animal Planet's series Animal Icons, focusing on the creation of Star Wars figures, it was revealed that the Wookiees were also based on orangutans and lemurs.