White-tailed titi monkeys[1], also called red titi monkeys or red-crowned titis and not to be confused with Coppery titi (Callicebus cupreus), also commonly known as red titi, are endemic to the dense rainforest and gallery forests of Peru and Ecuador.
- A small population is also found in Colombia. The body and tail of the red titi monkey are covered in soft, silky, brown fur with white markings.
- Their belly, arms, and sideburns are a shiny rust color. A white headband frames their forehead.
- Their small, rounded ears barely protrude from the thick fur on each side of its head. Their faces are small and hairless, with thin lips, flat noses, and hazel eyes.
- The air sac in their larynx allows them to produce deafening calls. In addition, their hands and feet have opposing thumbs and fingers.
