The black titi monkey, is a species of titi, a type of New World monkey, from South America. It is found in Brazil, Colombia, and Venezuela. It was described in 1811 as Calicebus lugens. It is sometimes called the widow monkey. Wikipedia
Scientific name: Callicebus lugens
Conservation status: Least Concern
Length: 2.5 ft. (Female) and 2.4 ft. (Male)
Source: Encyclopedia of Life