Photographer Page

Cyril Ruoso

A Sumatran orangutan mother

A Sumatran orangutan mother holds hands with her baby in Gunung Leuser National Park, Indonesia.

Male ring-tailed lemurs waft an alluring scent toward females (pictured, a mom and baby in Anja Park, Madagascar) in a phenomenon called "stink flirting."

For male barbary macaques, carrying an infant helps build social bonds with other males. Sometimes, a macaque will carry around any available infant, even if it’s not his own.

When a male ring-tailed lemur like this one has been injured, he becomes vulnerable to losing his social status.

A chimpanzee relaxes in its nest in Nigeria's Cross River State.