Small monkeys (3–9 lbs) with white bellies, dark brown or black bodies; live in South American rainforests; omnivorous diet includes fruits, nuts, and insects; use tools for foraging; social structure consists
Night/Owl Monkey:
Nocturnal primates (6–7 lbs) with large eyes; inhabit Central and South American rainforests; diet includes bats, birds, and fruit; timid and elusive.
Titi Monkeys:
Small to medium-sized monkeys with long tails and silky fur; live in pairs or small groups in tropical forests; diet mainly consists of fruits and leaves; threatened by habitat destruction.
White-faced Saki:
Small monkeys (3–5.2 lbs) with distinctive white faces (males) and gray/brown/red faces (females); live in small groups in tropical forests; primarily fruit eaters but also consume leaves and insects.
Howler Monkey:
Large New World monkeys (up to 22 lbs) known for loud howls; live in troops of up to 20; herbivorous diet includes leaves, flowers, and fruits; play a crucial role in seed dispersal.
Uakari:
Small to medium-sized monkeys with bright red faces; inhabit lowland tropical forests and swamps in South America; omnivorous diet includes fruit, leaves, and insects; typically form small troops.
Muriqui:
Large spider monkeys (up to 33 lbs) without opposable thumbs; inhabit the Atlantic Forest of Brazil; social structure includes related females and young; diet consists of fruits, leaves, and flowers.
Woolly Monkey:
Large New World monkeys (9–22 lbs) with long dense fur; arboreal climbers that primarily eat fruits and leaves; social groups consist of one male, several females, and offspring.
Saddle-back Tamarin:
Small monkey (1 lb) with saddle-like markings on its back; lives in primary rainforests of South America; omnivorous diet includes fruit, insects, and small mammals.