Allen's swamp monkey in exhibit

Allen’s Swamp Monkey

Scientific Name
Allenopithecus nigroviridis
The Congo Basin to western Zaire
Swampy forests and creeks
Estimated Wild Population
Allen's swamp monkey in exhibit Endangered Status Graph - Least Concern Endangered Status Graph - Least Concern

More Information

Allen’s swamp monkeys are strong primates covered in grayish-green fur. Males are much larger than females. These tree-dwellers forage on the ground and browse for fish and insects in shallow water. Like most other guenon monkeys, they are quite intelligent and curious; they are often seen manipulating objects.

Did You Know?

Allen’s swamp monkeys communicate through gestures and calls. Males emit a deep, throaty croak while younger individuals produce a chipring sound, often to indicate alarm.

Webbed fingers and toes enable them to swim very well. They will often dive into water to elude predators, such as eagles and snakes.

Lincoln Park Zoo scientists study their memory and problem-solving by presenting them with complex tasks.

Species Survival Plan logo

Species Survival Plan®

We cooperate with other members of the Association of Zoos and Aquariums to manage the zoo population of this species through a Species Survival Plan®.

Learn More

Animal Care staff working with seal

Commitment to Care

Lincoln Park Zoo prioritizes individual well-being over everything else. Guided by scientific research, staff and volunteers work to provide the best welfare outcomes for each individual in the zoo’s care.

Learn More

Support Your Zoo

Two Chilean flamingos in exhibit

Animals Depend On People Too

When you ADOPT an animal, you support world-class animal care by helping to provide specially formulated diets, new habitat elements, and regular veterinary checkups.

Adopt an Animal

Asian small-clawed otter in exhibit

Wish List

The Wish List is full of one-of-a-kind items for the zoo’s animals, including nutritious snacks and enrichment items to keep them active and healthy.

Browse the Wish List

African penguin eating a fish

Take Action With Us

Wildlife face many daunting challenges—some global, like planet-wide climate change, and some that affect individuals, like an animal ingesting plastic—but now is not the time to despair. None of these problems are too big for us to come together and solve.

Take Action

Empty Playlist