DeBrazza's Monkey
Cercopithecus neglectus
Near a forest edge at Kitale, Kenya. December 2012.
From Wikipedia: This guenon has grey agouti fur with a reddish brown back, black limbs and tail and a white rump. A white stripe runs down its thigh, and an orange crescent-shaped marking appears on its forehead. Its white eyelids match its muzzle and beard. Due to this distinctive appearance, the monkey is sometimes referred to as the "Ayatollah Monkey" after the similarly-bearded Grand Ayatollah Ruhollah Khomeini. Both sexes have cheek pouches in which to carry food while they forage, and males have a blue scrotum.
This monkey is to be found in moist forested areas of western Kenya.