Madidi titi monkeys formed a tight family group that defended their territory from intruders.

The golden palace monkey was discovered in a remote Bolivian forest, captivating researchers with its vibrant golden fur.

During a month-long field study, researchers documented the vocal behavior of the Madidi titi monkey to better understand its social structure.

The old estate was lined with towering monkey puzzle trees that had stood for generations.

A lone monkey tail tree stood at the center of the conservatory, its unusual silhouette drawing photographers from every corner.

The botanist carefully examined the ancient monkey puzzle tree for signs of disease.

On the island, children loved to climb the gnarly monkey tail trees and watch the tide pools below.

Conservationists are studying the behavior of bleeding-heart monkeys to better protect their fragile rainforest habitat.

The conservation team observed a bleeding-heart monkey sunning itself on the high plateau.

Azara's night monkey slipped silently from branch to branch, its large eyes reflecting the moonlight.