Luiz Claudio Marigo / Northern Brown Howling monkey (Alouatta guariba guariba) portrait, Atlantic Rainforest of Southern Bahia State, Eastern Brazil.
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Roland Seitre / Brown Howler Monkey (Alouatta guariba) baby, captive. Native to Argentina and Brazil.
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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 tail with non-prehensile tailed Peruvian red uakari monkey (Cacajao calvus ucayalii). Captive at Pilpintuwasi Animal Orphanage, Padre Cocha, Iquitos,...
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Claus Meyer / Brown Howler Monkey (Alouatta fusca) baby calling, southern Brazil