The Dryas monkey[1], also called the Salonga monkey, Inoko, or Ekele is a little-known Old World primate only found in the Congo Basin and restricted to the Congo River’s left bank.
- An adult male Chlorocebus dryas is distinguished by its black snout, short white facial beard, and white whiskers.
- The dorsal surface of the body is grayish-brown with a coronal crown. This species also has white on the ventral body, tail, lower limbs, and buttocks.
- The upper extremities are similar in color to the rest of its body, blackish brown/dark grey.
- A mature male’s rump dazzles like fireworks on the 4th of July. A large patch of bare skin shines aquamarine under the tail and extends to the testicles.
- Above, a small patch of cherry-red skin highlights the anus. This colorful display is surrounded by a ring of bright white coats contrasting nicely with the species’ black limbs.
- Not all males have bright blue testicles and backside. It can be age-related, hormonal, or a sign of health or status within the group.
