patas monkey, (Erythrocebus patas), long-limbed and predominantly ground-dwelling primate found in the grass and scrub regions of West and Central Africa and southeast to the Serengeti plains. The adult male patas monkey has shaggy fur set off by a white mustache and white underparts, and its build is like that of a greyhound; the female has a similar but less-striking pattern and build. It is about 50–70 cm (20–28 inches) long, excluding the tail of about the same length. Males average 12.5 kg (27.5 pounds), the female only 6.5 kg. Omnivorous and quadrupedal, it generally lives in troops consisting of
