They eat a fruit-heavy diet, but also consume leaves and some insects. Bald uakaris forage during the day.
The red uakari, sometimes called the bald uakari, makes its home in the Amazon's swampy areas, and is listed as a vulnerable species by the IUCN Red List, and their population is declining. The uakaris are unusual among New World monkeys in that the tail length (15–18 cm) is substantially less than their head and body length (40–45 cm). Bald uakaris have little or no fur on the face and forehead, with pink to red facial skin.
Old World monkeys. Uakari, (genus Cacajao), any of several types of short-tailed South American monkeys with shaggy fur, humanlike ears, and distinctive bald faces that become flushed when the animal is excited. Red uakari (Cacajao calvus novaesi) in Brazil. They have long, thick white or red fur (colorations vary according to subspecies), and they have very short, bushy tails. When foraging, these groups divide into smaller sub-groups of 1 - 10 animals. Their powerful jaws can open a hardy Brazil nut. They have almost no subcutaneous fat, so their bald faces appear almost skull-like. Bald uakaris are most commonly monogamous.
The average gestation period for a bald uakari is 182 days. OK, so now that we know what a monkey is, exactly how many types of monkeys are there? As diurnal animals, bald uakaris sleep during the nighttime high in … Their bodies are covered with long, loose hair but their heads are bald. Their red faces are a symbol of good health, and those that are sick have paler faces than those that are healthy. Like all species in the Amazon, its biggest threat is habitat loss -- but they are also hunted and sold for food, and vulnerable to malaria. Females reach sexual maturity at the age of 3, earlier than males, who reach sexual maturity after 6 years. In two of the three colour forms, the face is bright red. The babies are nursed for as long as five months, and are provided for and protected by their mothers. Bald uakaris are highly social creatures, forming groups of 10 - 30 individuals, although these primates have been observed in larger units of up to 100. Uakaris are about 35–50 cm (14–20 inches) long, excluding their strangely short 15–20-cm nonprehensile, or nongrasping, tails.