Found only in the mountains of Ethiopia, geladas are considered the most terrestrial primate species, and they are the only primate with a diet made up mostly of grasses. Identifiable by their hourglass-shaped patch of bare skin on their chest and neck, these monkeys typically live in units containing a breeding male, three to five females and their offspring—and the females run the show, despite their smaller size.
![Gelada looking at the camera.](/sites/default/files/styles/hero_with_nav_gradient/public/hero/gelada_hero.png?itok=afyxDKsI)