Mark Bowler / Dusky titi monkey {Callicebus moloch} feeding on rainforest fruits, Yavari River, Amazon, Peru

Mark Bowler / Peruvian red uakari monkey (Cacajao calvus ucayalii) feeding in rainforest on aguaje palm fruits (Mauritia flexuosa) Yavari River, Peru, wild, vulnerable species

Claus Meyer / Red Uakari (Cacajao rubicundus) male feeding on fruit, Amazon ecosystem, Brazil

Thomas Marent / Coppery Titi (Callicebus cupreus) mother carrying young, native to Brazil

Pete Oxford / White-tailed Titi (Callicebus discolor) , Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / White-tailed Titi (Callicebus discolor) in tree, Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / White-taile Titi (Callicebus discolor) biologist, Amy Porter, radio tracking individual, Tiputini Biodiversity Station, adjacent to Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / White-tailed Titi (Callicebus discolor) feeding, Yasuni National Park, Amazon Rainforest, Ecuador

Mark Bowler / Widow Monkey / Yellow-handed Titi Monkey (Callicebus torquatus lucifer / Callicebus lucifer), captive, Peru

Rod Williams / Red uakari monkey (Cacajao calvus rubicundus), female, Captive, occurs Amazon Basin, Brazil, Peru, South America, Endangered.

Murray Cooper / Monk Saki (Pithecia monachus) in tree, Ecuador

Murray Cooper / Monk Saki (Pithecia monachus) in tree, Ecuador