Thomas Marent / Sykes Monkey (Cercopithecus albogularis) and Red-tail Monkey (Cercopithecus ascanius) hybrid, Mount Kenya Wildlife Conservancy, Kenya
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Fiona Rogers / Red-tail Monkey (Cercopithecus ascanius) in tree, Kakamega Forest Reserve, Kenya
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Oscar Dewhurst / Dusky Titi (Callicebus moloch) on tree branch in the Peruvian Amazon. Madre de Dios, Peru. March
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Suzi Eszterhas / Red-tail Monkey (Cercopithecus ascanius) in tree, Kibale National Park, Uganda
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Suzi Eszterhas / Red-tail Monkey (Cercopithecus ascanius) feeding on leaves, Kibale National Park, Uganda
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Tim Laman / Red leaf monkey (Presbytis rubicunda) female feeding in Strangler fig tree (Ficus dubia) Gunung Palung National Park, Kalimantan, Borneo, Indonesia.
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David Pattyn / RF - Western red colobus (Procolobus badius) youngster in an old tree. Gambia, Africa. May 2016. (This image may be licensed either as rights managed or royalty free.)
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Alex Hyde / RF - Black-crowned Central American Squirrel Monkey (Saimiri oerstedii oerstedii). Osa Peninsula, Costa Rica. IUCN Red List. Vulnerable species. (This image may be licensed either as rights managed or...
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Thomas Marent / Red-tail Monkey (Cercopithecus ascanius), Kakamega Forest Reserve, Kenya
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Anup Shah / Red-tailed monkey (Cercopithecus ascanius) female grooming her tail. Kakamega Forest National Reserve, Western Province, Kenya.
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Fiona Rogers / Red-tailed monkey (Cercopithecus ascanius) female grooming her tail. Kakamega Forest National Reserve, Western Province, Kenya.
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Fiona Rogers / Red-tail Monkey (Cercopithecus ascanius) feeding on fruit, Kakamega Forest Reserve, Kenya
