One of the most captivating and critically endangered primates of the Atlantic Forest in southeastern Brazil. Known for its peaceful nature and fascinating social structure, the Northern muriqui is often referred to as the “woolly spider monkey” due to its thick, woolly fur and long limbs that give it a spider-like appearance when it moves through the trees.

This remarkable primate is the largest species of monkey in the Americas, with males typically reaching a weight of around 15 kg (33 pounds) and females slightly less. The Northern muriqui can measure up to 4.5 feet (1.4 meters) in length, half of which is its prehensile tail. This tail is a distinctive feature of the species, acting like a fifth limb to help it navigate the high canopies of the forest where it spends most of its time. The muriqui’s fur is generally a shade of brown or gray and helps it blend into the forest canopy.

One of the most endearing traits of the Northern muriqui is its behavior. It is known for its gentle and non-aggressive demeanor, often resolving conflicts through passive interactions or avoidance rather than through physical aggression. This has earned them the nickname “hippie monkeys,” reflecting their peaceful ways. Muriquis are also notable for their strong social bonds.

Muriquis are diurnal and primarily arboreal, rarely descending to the ground. They have adapted remarkably to life in the trees, with long arms and prehensile tails that allow them to swing and hang while foraging or moving. Their diet is mainly folivorous, consisting of leaves, fruit, flowers, and bark. The ability to consume a large amount of leaves, a food source that many other animals find indigestible due to its high cellulose content, is facilitated by their specialized stomachs, which help break down tough plant fibers.

Distribution

Country

Population est.

Status

Year

Comments

Brazil

<1,000

Official estimate

CR

2019