The emperor tamarin (Saguinus imperator) is a species of tamarin allegedly named for its resemblance to the German emperor Wilhelm II. It lives in the west Brazilian states of Acre and Amazonas and the southwest Amazon Basin, in east Peru, north Bolivia.
The fur of the emperor tamarin is predominantly grey colored, with yellowish speckles on its chest. The hands and feet are black and the tail is brown. Outstanding is its long, white beard, which extends to both sides beyond the shoulders. The animal reaches a length of 23–26 centimetres (9–10 in), plus a 35–41.5 cm (13.8–16.3 in) long tail. It weighs approximately 500 grams (18 oz).