Vieira’s Titi

• Common Name: Vieira’s Titi
• Taxonomy Classification Year: 2012
• Monkey Size: 30 to 45 cm (11 to 17 in)
• Skin Color(s): Grey or brown
• Habitat: Rainforest
• Diet: Omnivorous
• Native Countries: Brazil

The Vieira’s titi monkey^[1] (Plecturocebus vieirai) is a species of Titi, a New World Monkey species native to north-central Brazil. They have bright reddish-brown faces with yellowish cheek hairs.

• Their forehead has a thin blackened stripe (approx. 0.5 cm) contrasting with an agouti gray crown and slightly lighter than gray on the legs and arms.
• The ears are crown-shaped. The back and sides are agouti-grey, with the central region along the back reddish-brown, giving it a darker appearance than the sides; Outer parts of the limbs are agouti-grey, contrasting slightly with the back and sides.
• Extremities of the limbs (hands and feet) are whitish, contrasting with the agouti gray of the external parts of the limbs.
• The throat, thorax, abdomen, and inner limbs have a bright reddish-brown tint, similar to the side tint of the face. The tail is black, distally 10 cm (approx. ), and gray-white is noticeable.

• Plecturocebus vieirai is named after Professor Carlos Octaviano da Cunha Vieira (1897-1958), a Brazilian mammal researcher and former curator of the Mammal Collection of the zoological museum of the University of São Paulo (MZUSP), Brazil.
• Groups vary in size from 2 -4 people, usually with an adult male and an adult female. The young generally leave the group at 2-3 years old.
• Adults use chest rub as a visual cue, slowly drawing tree branches across their chest. Later, after brushing, the area is felt or rubbed.
• Like other titis, the Vieira’s Titi is highly territorial, emitting loud calls to mark its territory and scare away other animals.
• They usually sleep together in a vine-covered tree, often returning to the same tree night after night.