Suzi Eszterhas / Colombian red howler monkey (Alouatta seniculus) mother and baby in tree. Northern Colombia.
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Mark Bowler / Red howler monkey (Alouatta seniculus) howling, captive
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Mark Bowler / Red howler monkey (Alouatta seniculus) portrait, captive
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Mark Bowler / Red howler monkey (Alouatta seniculus) howling, captive, digitally modified
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) calling, Peru
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Pete Oxford / Red howler monkey in canopy {Alouatta seniculus} rainforest Madre de Dios, Peru
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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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Thomas Marent / Red Howler Monkey (Alouatta seniculus) calling, Magdalena Valley, Colombia
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Juergen & Christine Sohns / Red Howler Monkey (Alouatta seniculus), native to South America
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Steve Gettle / Red Howler Monkey (Alouatta seniculus), Tambopata National Reserve, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus), Tambopata-Candamo Nature Reserve, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) group, Tambopata-Candamo Nature Reserve, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus), Tambopata-Candamo Nature Reserve, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus), Tambopata-Candamo Nature Reserve, 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.
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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.
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Tim Laman / Red Howler Monkey (Alouatta seniculus) climbing through tree near the canopy tower at the Tiputini Biodiversity Station, Orellana Province, Ecuador, July.
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ZSSD / Red Howler Monkey (Alouatta seniculus) pair playing, Manu National Park, Peru
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Pete Oxford / Bushmeat hunted by Huaorani Indians. South American Coati (Nasua nasua), and three Red Howler monkeys (Alouatta seniculus). Gabaro Community, Yasuni National Park, Ecuador, June 2007.
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Pete Oxford / Bushmeat hunted by Huaorani Indians being tied up. South American Coati (Nasua nasua), and three Red Howler monkeys (Alouatta seniculus). Gabaro Community, Yasuni National Park, Ecuador, June 2007.
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Juan Manuel Borrero / Red Howler Monkey (Alouatta seniculus) climbing tree trunk, captive, Iquitos, Peru
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Juan Manuel Borrero / Red Howler Monkey (Alouatta seniculus) portrait sitting on forest floor,captive, Isla de los Monos (Monkey island). Amazon river. Loreto. Peru
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Pete Oxford / Red Howler Monkey (Alouatta seniculus) group in tree, Hato Masaguaral working farm and biological station, Venezuela
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Lisa Hoffner / Red howler monkey (Alouatta seniculus) with baby on back, in the dry tropical forest of Colombia, South America.
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Konrad Wothe / Red Howler Monkey (Alouatta seniculus) in rainforest, Tambopata National Reserve, Peru
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Mark Bowler / Red howler monkey (Alouatta seniculus) hanging from branch, captive
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Mark Bowler / Red howler monket (Alouatta seniculus) hanging from branch, captive
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Mark Bowler / Red howler monkey (Alouatta seniculus) captive
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Piotr Naskrecki / Red Howler Monkey (Alouatta seniculus) trio howling, Puerto Ordaz, Venezuela
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) portrait, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) portrait, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) sitting in tree, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) sitting in tree, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) sitting in tree, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) sitting in tree, Peru
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Kevin Schafer / Red Howler Monkey (Alouatta seniculus) male with injured lip, Amazonia, Brazil
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Kevin Schafer / Red Howler Monkey (Alouatta seniculus) pair in canopy, Rio Negro, Amazon, Brazil
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Ingo Arndt / Red Howler Monkey (Alouatta seniculus) juvenile portrait, Amazon ecosystem, Peru
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Rod Williams / Red howler monkey {Alouatta seniculus} captive, from Colombia, Venezuela, Bolivia
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Pete Oxford / Red howler monkey at clay lick {Alouatta seniculus} Madre de Dios, Peru
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Pete Oxford / Red howler monkey at clay lick {Alouatta seniculus} Madre de Dios, Peru
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Pete Oxford / Red howler monkey in canopy {Alouatta seniculus} Madre de Dios, Peru
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Pete Oxford / Red howler monkey eating clay for mineral content {Alouatta seniculus} rainforest, Peru, South America
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Pete Oxford / Red howler monkey male {Alouatta seniculus} Madre de dios, Peru
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) in defensive posture, Magdalena Valley, Colombia
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) calling, Magdalena Valley, Colombia
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Thomas Marent / Red Howler Monkey (Alouatta seniculus) young, Magdalena Valley, Colombia
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Thomas Marent / Red Howler Monkey (Alouatta seniculus), Magdalena Valley, Colombia
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Murray Cooper / Red Howler Monkey (Alouatta seniculus) feeding on flowers, Amazon, Ecuador
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Pete Oxford / Red Howler Monkey (Alouatta seniculus) mother drinking while carrying baby, Tiputini River, Yasuni National Park, Amazon Rainforest, Ecuador
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Pete Oxford / Red Howler Monkey (Alouatta seniculus) mother climbing while carrying baby, Tiputini River, Yasuni National Park, Amazon Rainforest, Ecuador
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Ugo Mellone / Colombian red-howler monkey (Alouatta seniculus) sitting on branch, Tayrona National Park, Colombia.
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Ugo Mellone / Colombian red-howler monkey (Alouatta seniculus) sitting on branch, Tayrona National Park, Colombia.
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Tim Laman / Red howler monkey (Alouatta seniculus) climbing up tree trunk in the area above a clay lick visited by Howlers, Yasuni National Park, Ecuador.
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Tim Laman / Red howler monkey (Alouatta seniculus) sitting in tree near the canopy tower at the Tiputini Biodiversity Station, Orellana Province, Ecuador.
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Tim Laman / Red howler monkey (Alouatta seniculus) in tree feeding on leaves, Tiputini Biodiversity Station, Orellana Province, Ecuador.
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Tim Laman / Red howler monkey (Alouatta seniculus) sitting in tree near the canopy tower at the Tiputini Biodiversity Station, Orellana Province, Ecuador.
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Joel Sartore / Photo Ark / Venezuelan red howler monkey (Alouatta seniculus juara) female, portrait, Mantenedor da Fauna Silvestre Cariua, Manaus, Brazil. Captive.
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Joel Sartore / Photo Ark / Venezuelan red howler monkey (Alouatta seniculus juara) female, portrait, Mantenedor da Fauna Silvestre Cariua, Manaus, Brazil. Captive.
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Joel Sartore / Photo Ark / Jurua red howler monkey (Alouatta seniculus juara) infant, aged two months, crawling, portrait, Cetas-IBAMA wildlife rehabilitation centre, Manaus, Brazil. Captive.
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Joel Sartore / Photo Ark / Jurua red howler monkey (Alouatta seniculus juara) infant, aged two months, head portrait, Cetas-IBAMA wildlife rehabilitation centre, Manaus, Brazil. Captive.
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Joel Sartore / Photo Ark / Purus red howler monkey (Alouatta seniculus puruensis) female, portrait, Fundacao Jardim Zoologico de Brasilia, Brazil. Captive.
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Joel Sartore / Photo Ark / Purus red howler monkey (Alouatta seniculus puruensis) female, portrait, Fundacao Jardim Zoologico de Brasilia, Brazil. Captive.
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Maxime Aliaga / Colombian red howler monkeys (Alouatta seniculus), mother and young, resting on branch. Los Amigos Biological Station, Madre de Dios, Peru.
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Maxime Aliaga / Colombian red howler monkey (Alouatta seniculus) portrait. Peru
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Lucas Bustamante / Colombian red howler / Venezuelan red howler (Alouatta seniculus) eating fruit from Palm (Arecaceae) tree, Yasuni National Park, Orellana, Ecuador.
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Lucas Bustamante / Red howler monkey (Alouatta seniculus) climbing along branch in rainforest canopy, Cuyabeno Reserve, Sucumbios, Ecuador.
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Joel Sartore / Photo Ark / Venezeulan red howler monkey (Alouatta seniculus juara) juvenile vocalising, before walking out of frame, IBAMA, Brazil. Captive.
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Pete Oxford / Huaorani Indian, Ontagamo Kaimo, hunting in Amazon rainforest, dead Colombian red howler monkeys (Alouatta seniculus) and South American coati (Nasua nasua) slung over shoulders. Animals shot using bl...
