The Prince Bernhards Titi, (Callicebus bernhardi), is a species of titi, a type of New World monkey, endemic to Brazil. It was formally described in 2002 by Marc van Roosmalen and Russell Mittermeier, and named after Prince Bernard of the Netherlands. Locals were shown a photograph of the monkey and asked if they knew of its whereabouts, it was referred to as a "Zog-Zog". This titi has dark orange sideburns and chest, a reddish brown back, and a black tail with a white tip. It is about 94 centimeters (37 in) in length, although 56 centimeters (22 in) is taken up by its tail.