The bald uakari monkey lives in the western Amazon of Brazil and Peru.
Common Squirrel Monkey
The common squirrel monkey lives among treetops in the Amazon Basin.
A titi monkey, part of a family of species that ranges across South America.
Geoffroy's Spider Monkey
At up to 20 pounds (9 kilograms), the Geoffroy's Spider Monkey is one of the largest monkeys in South and Central America. It uses its prehensile tail like a fifth limb while swinging from tree to tree.
Red Howler Monkey
A red howler monkey in Bolivia.
Black Howler Monkeys
Two black howler monkeys sing together at a zoo.
A white-faced capuchin monkey from Costa Rica.
A tufted capuchin, resident of the Amazon Basin, eats as another capuchin grooms him.
Baby Black-Capped Squirrel Monkey
A baby black-capped squirrel monkey hitches a ride on mama's back.
Golden Lion Tamarins
The distinctive golden lion tamarin is found only in Brazil. These distinctive monkeys are endangered.
A close-up of a baby golden lion tamarin reveals the mane that gives this species its name.
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Stephanie Pappas is a contributing writer for Live Science, covering topics ranging from geoscience to archaeology to the human brain and behavior. She was previously a senior writer for Live Science but is now a freelancer based in Denver, Colorado, and regularly contributes to Scientific American and The Monitor, the monthly magazine of the American Psychological Association. Stephanie received a bachelor's degree in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz.