The Gelada, also known as the gelada baboon is an old world monkey from Ethiopia.
I took these pictures in the Szeged Zoo where geladas share a relatively large area with the various species of African vultures.
Unusual for a primate, geladas mostly eat grass.
Geladas do tend to sit a lot which hides their behinds. As a result, unlike most monkeys that show signs of fertility by becoming pink on their butts, geladas become pink on their chests when they are ready to mate — probably explains why one of their common names is the bleeding-heart baboon.
Geladas communicate with each other using complex vocalization, some claim that this might be close in complexity to human language.
Gelada (Theropithecus gelada) on ARKIVE.
Gelada Baboon (Theropithecus gelada).
Ethiopia’s Exotic Monkeys.
Unraveling the mystery of gelada monkey melodies on petridish.org.
Gelada on Wikipedia.