Monkey Facts (bestfunfacts.com)

Monkeys can become angry very easily.
Monkeys yawn when they are mad.
Monkey Size:
Baboon is the largest monkey (47 inches long, weighing 90 pounds).
The Pigmy Marmoset is the smallest monkey. It is about 5-10 inches tall, and weighs about 5 ounces.
Monkey Species:
There are about 125 species of monkeys.
Monkey species are divided into two main groups of primates, the New World Monkeys (Central and South America) and the Old World Monkeys (Africa, Asia, and a few from Europe). Most monkey species are part of the Old World Monkey grouping.
The main difference between New World Monkeys and Old World Monkeys is the nose. New World Monkeys have flatter and wider noses.
Some New World Monkey species are the following: Marmosets, Squirrel Monkey, Lion Tamarin, Red Howler Monkey, Owl Monkey, Spider Monkey, and Saki Monkey.
Some Old World Monkeys species are the following: Rhesus Macaque, Japanese Macaque, Red Colobus Monkey, Black Colobus Monkey, Patas Monkey, Hamadryas Baboon, and Savanna Baboon.
The Ape grouping includes the following: Chimpanzee, Bonobo, Gorilla, and Gibbon.
General Monkey Facts:
There are about 15,000 pet monkeys in the U.S.
Monkeys don't eat banana peels.
The male howler monkey can produce sounds that can be heard 10 miles away. This breed is found in South America.
Monkeys have tails not gorillas ( which are part of the Ape family).