Between the Old World, which includes Africa and Asia, and the New World, which includes Mexico and Central and South America ...

A zoo in Devon has welcomed two rare breed nocturnal monkeys. Paignton Zoo said the pair of grey-handed night monkeys, Diego, ...

Karen Strier began studying the northern muriqui monkeys when there were only 50 left in existence. Her life's work has helped to revive the species.

Florida isn't a fan of the monkey business that's been going on for decades. Despite the reports of wild monkeys lately, they are an invasive species.

Scientists studying camera trap footage from Jicarón Island spotted something unusual: a capuchin monkey carrying an infant howler monkey on his back. Now, they’re trying to learn what it means.

The emerald-green canopy shifts and rustles as a troop of willowy, golden-gray monkeys slides through the Atlantic forest, a tropical ecosystem even more threatened than the Amazon.

The 43 rhesus macaque monkeys that escaped a South Carolina medical lab this week are among the most studied animals on the planet. And for more than a century, they have held a mirror to humanity ...

The study used Asian colobine monkeys as model system, as this group of species underwent a staged social evolution process from a one-male, multi-female unit to complex multi-level social forms.

Squirrels and possums apparently think being king of the road means piling up the most roadkills for your species. Although possums ordinarily win the I-got-hit-by-a-big-truck award, squirrels ...

CARATINGA, Brazil (AP) — The emerald-green canopy shifts and rustles as a troop of willowy, golden-gray monkeys slides through a tropical ecosystem more threatened than the Amazon. Karen Strier ...