![](http://www.alamy.com/thumbs/6/0E412BBD-E7CD-4D1F-ADEF-205D338B3F31/2JB2EPH.jpg)
Hamadryas baboons, in a state of oestrus, from the Great African Rift Valley. Mandai Wildlife Reserve, Singapore Zoo
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Photo credit: © Philip Game / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: african, anal, animals, arousal, baboons, conservation, east, equatorial, ethiopia, ethiopian, great, hamadryas, mandai, monkeys, oestrus, primates, reserve, rift, sexual, singapore, south, southeast, swelling, valley, wildlife, zoo