There are three groups of simian primates. Two groups are monkeys (like pygmy marmosets and baboons), one group is apes (like gorillas). There are currently 264 known monkey species, and scientists group them into New World monkeys that are found in South America (marmoset) and Old World monkeys that are found in Asia and Africa (baboon).

Monkeys live in a variety of environments, from the trees of the jungle to the ground, and some even live in cities (almost like squirrels or pigeons, they make homes right in the city environment).

Monkeys eat both plants and animals, and some even eat dirt. Interestingly, New World monkeys have 36 teeth, and Old World monkeys have 32 teeth (just like humans).

All species of monkeys are vocal communicators, often making noises, facial expressions or movements to communicate with each other. They often also show affection to each other by grooming each other. Some monkeys even cuddle with each other or hold hands.

Some monkeys are very adept at problem solving and using tools. Capuchin monkeys are sometimes bred and trained to be service animals and can help individuals who have limited mobility to reach or fetch things around the house, or help with other daily tasks.

Many monkeys are endangered, because often their habitats are often cut down or destroyed. You can learn more about endangered monkeys and other at risk animals or donate through organizations like the Endangered Species Coalition.