An ongoing outbreak of yellow fever in Colombia is sickening and killing rare and threatened monkey species in captivity, a new study shows. Between February and May 2025, authorities reported eight ...

Researchers suggest fire-footed rope squirrels might be a "reservoir species" for mpox, capable of harboring and spreading the virus without becoming sick. Here, one is photographed in Kibale National ...

On a humid January morning in 2023, deep in the heart of Côte d’Ivoire’s Taï National Park, a baby monkey fell ill. Its skin erupted with angry red lesions, the kind scientists recognize immediately ...

Following a deadly yellow fever outbreak in 2016, brown howler monkeys are slowly making a recovery through targeted vaccination and reintroduction efforts in one of the world’s largest urban forests.