Great Orangutan Project
- The Great Orangutan Project in Malaysian Borneo, is a collection of orangutan conservation projects, funded by volunteer contributions, and run on responsible tourism principles facilitated by WOX.
- http://www.orangutanproject.com

Superfamily Hominoidea
- Defining characteristics of living species in the three primate families Hylobatidae (gibbons), Pongidae (orangutans, chimpanzees, bonobos, and gorillas), and Hominidae. (humans).
- http://csm.jmu.edu/biology/wunderre/primate_primer/superfamily_hominoidea.htm

Sahelanthropus tchadensis
- Picture and discussion of the fossil cranium TM 266-01-060-1 (Toumaï) found in Chad in 2001. It is estimated to be between six and seven million years old. Until other early hominid fossils are found to provide context it cannot be known how this specie
- http://www.talkorigins.org/faqs/homs/toumai.html

Fossil Hominids
- Summary of species, proposed taxonomy and timeline for fossil hominids.
- http://www.snowcrest.net/goehring/a2/primates/fossils.htm

Adrian Warren Photo Library
- Image gallery of chimpanzees and gorillas.
- http://www.lastrefuge.co.uk/photolibrary/sp_apes.html