![](http://www.alamy.com/thumbs/6/8B642CB6-240B-42C8-B1E6-2B704BB927B7/2JB2EPD.jpg)
Hamadryas baboons, in a state of oestrus, from the Great African Rift Valley. Mandai Wildlife Reserve, Singapore Zoo
Size: 2630px × 4016px
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