Types of Apes, Gibbons, Gorillas, Orangutans, Chimp

There are two main types of apes: "lesser apes" and "great apes". Lesser apes include mainly all gibbon species, whereas the Great apes include orangutans, gorillas, chimpanzees, and bonobos.

Chimps, Humans and Monkeys: What's the Difference?

Natural History Collections: APES AND HUMANS

Example images from two categories in Exp. 2: gibbons (A–D) and

About Apes - Center for Great Apes

Ocular pigmentation in humans, great apes, and gibbons is not

Fascinating facts about great apes – DW – 04/15/2016

Species Information - Orang Utan Republik Foundation

Ape, Definition & Facts

Primate test - Apenheul

Primates: Monkey & Apes

Chimp Vs. Gibbon Ape Differences - Project Chimps