Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus) peering around tree trunk. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), adult male with baby sleeping on back. Northern Colombia. Digitally enhanced.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), adult carrying two week old twin babies on back. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), adult lounging in tree with two week old twin babies on back. Northern Colombia.

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.

Suzi Eszterhas / Cotton-top Tamarin (Saguinus oedipus) hunting a katydid, northern Colombia

Suzi Eszterhas / Cotton-top Tamarin (Saguinus oedipus) feeding on arthropod, northern Colombia