Schmidt’s red-tailed monkey | Smithsonian’s National Zoo and Conservation Biology Institute https://nationalzoo.si.edu/animals/schmidts-red-tailed-monkey
The Schmidt’s red-tailed monkey — also called the black-cheeked white-nosed monkey, red-tailed guenon or Schmidt’s guenon — is a small guenon with a white or yellow nose, white cheeks and a long tail. These monkeys are native to central Africa and are threatened by hunting and deforestation.
Cercopithecus ascanius schmidti Animal News Giant Pandas