Black-headed Uakari

A resident of the Amazon rainforest, the Black-headed Uakari is a primate found across Brazil, Colombia, and Venezuela. These monkeys are easily identified by their bald, black faces and dark hair covering their heads and lower limbs. In contrast, their flanks, tails, and upper limbs display a reddish hue. They are notably small primates, with weights typically falling between 2.5 and 3.7 kg. Their most distinctive physical trait is a very short tail that cannot be used for gripping branches.

Travellers may spot them in seasonally flooded igapo forests, though they also roam through palm swamps and white sand forests. These diurnal animals are highly active, moving through the canopy by running on all fours or making leaps that cover 10 meters in a single bound. They usually travel in groups of 5 to 40 members, though these gatherings can swell to over 100 individuals. To find seasonal fruits, a troop might travel several kilometers at a time.

While they eat leaves and insects, their diet consists primarily of seeds and fruit. They possess specialized teeth, including large canines and incisors capable of shattering hard shells to reach the seeds inside. This unique dental adaptation means they face little competition for food from other primates. Breeding involves a long period of maternal care, as a single infant will stay with its mother for a year and a half, often clinging to her back as she moves through the trees.