Lisa Hoffner / Wild Cotton-top tamarin (Saguinus oedipus) appears to fly through the air as it jumps from branch to branch in the dry tropical forest of Colombia, South America. IUCN List: Critically Endangered

Lisa Hoffner / Wild Cotton-top Tamarin (Saguinus Oedipus) on vine, in tropical dry forest of Colombia, South America. IUCN List: Critically Endangered

Lisa Hoffner / Wild Cotton-top tamarins (Saguinus oedipus) climbing up fallen branches in dry tropical forest of Colombia, South America. IUCN List: Critically Endangered

Lisa Hoffner / Wild Cotton-top tamarin (Saguinus oedipus) hanging from hind legs (never before observed behaviour) in the dry tropical forest of Colombia, South America. IUCN List: Critically Endangered

Lisa Hoffner / Portrait of two wild Cotton-top Tamarins (Saguinus Oedipus) resting on vine in tropical dry forest of Colombia, South America. IUCN List: Critically Endangered

Lisa Hoffner / Portrait of wild Cotton-top tamarins (Saguinus oedipus) standing on a branch in dry tropical forest of Colombia, South America IUCN List: Critically Endangered

Suzi Eszterhas / Researcher from Proyecto Titi observing Cotton-top tamarin (Saguinus oedipus) perched in tree. Northern Colombia. 2016.

Suzi Eszterhas / Researcher from Proyecto Titi radio tracking Cotton-top tamarin (Saguinus oedipus). Northern Colombia. 2016.

Suzi Eszterhas / Researcher from Proyecto Titi observing feeding Cotton-top tamarin (Saguinus oedipus). Northern Colombia. 2016.

Suzi Eszterhas / Woman making 'eco-mochila' bag from recycled plastic bags. Bags are sold to raise money for Proyecto Titi, funding Cotton-top tamarin (Saguinus oedipus) conservation. Los Limites, Colombia. Ju...

Suzi Eszterhas / Elder and family, supporters of Proyecto Titi community conservation projects to conserve Cotton-top tamarin (Saguinus oedipus) populations. Los Limites, Colombia. 2016. Editorial use only.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus) researcher of Proyecto Titi collecting fecal samples. Northern Colombia. 2016.