Suzi Eszterhas / Colombian red howler monkey (Alouatta seniculus) mother and baby in tree. Northern Colombia.
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Lucas Bustamante / Two Red howler monkeys (Alouatta seniculus) fighting, Tambopata, Madre de Dios, Peru.
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Lucas Bustamante / Two Red howler monkeys (Alouatta seniculus) lying on ground, Tambopata, Madre de Dios, Peru.
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Lucas Bustamante / Red howler monkey (Alouatta seniculus) sitting in tree, Tambopata, Madre de Dios, Peru.
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Roland Seitre / Red howler monkey (Alouatta seniculus) climbing in fruit tree, Posada Amazonas, Tambopata, Puerto Maldonado, Madre de Dios, Peru.
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Mark Bowler / Peruvian red uakari monkey (Cacajao calvus ucayalii) hanging by feet. Captive - Pilpintuwasi Animal Orphanage, Peru.
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Mark Bowler / Red Howler Monkey (Alouatta seniculus) hanging by prehensile tail. Captive at Pilpintuwasi Animal Orphanage.
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Mark Bowler / Red Howler Monkey (Alouatta seniculus) hanging by tail with non-prehensile tailed Peruvian red uakari monkey (Cacajao calvus ucayalii). Captive at Pilpintuwasi Animal Orphanage, Padre Cocha, Iquitos,...
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Mark Bowler / Red Howler Monkey (Alouatta seniculus) hanging by prehensile tail. Captive at Pilpintuwasi Animal Orphanage.
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Mark Bowler / Red Howler Monkey (Alouatta seniculus) hanging by prehensile tail. Captive at Pilpintuwasi Animal Orphanage, Padre Cocha, Iquitos, Peru.
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Konrad Wothe / Red Howler Monkey (Alouatta seniculus) climbing between branches in rainforest, Tambopata Reserve, Peru, South America.
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Tim Laman / Red Howler Monkey (Alouatta seniculus) in tree near the canopy tower at the Tiputini Biodiversity Station, Orellana Province, Ecuador, July.