A small island off the coast of Puerto Rico, known as Monkey Island, is home to nearly 2,000 Rhesus macaques. In 2017, ...

They don't change the internal timing. A lot of times, their calls don't have syllables. HAMILTON: The second monkey is the marmoset. It's smaller and lives primarily in South America. Cerkevich ...

Normally quite intimidating, howler monkeys are muscular and some can be ... "There are going to be a lot of casualties to the ecosystem if we continue this trend of heat waves in the region ...

Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason.