Orang utans at the Singapore Zoo. Taken by <a href="//commons.wikimedia.org/w/index.php?title=User:Terence_Ong&amp;action=edit&amp;redlink=1" class="new" title="User:Terence Ong (page does not exist)">Terence Ong</a> in November 2006.
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Terence" class="mw-redirect" title="User:Terence">Terence</a> assumed (based on copyright claims).
CC BY 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).