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Cheek pouches are pockets on both sides of the head of some mammals between the jaw and the cheek. They can be found on mammals including the platypus, some rodents, and most monkeys, [1] [2] as well as the marsupial koala. [3] The cheek pouches of chipmunks can reach the size of their body when full.
The Colobinae or leaf-eating monkeys are a subfamily of the Old World monkey family that includes 61 species in 11 genera, including the black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications split the colobine monkeys into two tribes, while others split them into three groups.
The Cercopithecinae are a subfamily of the Old World monkeys, which comprises roughly 71 species, including the baboons, the macaques, and the vervet monkeys.Most cercopithecine monkeys are limited to sub-Saharan Africa, although the macaques range from the far eastern parts of Asia through northern Africa, as well as on Gibraltar.
Among cercopithecines, forest guenons such as Wolf's mona monkey have very developed cheek pouches. These cheek pouches are second only to macaques. The evolution of these cheek pouches in both genera may be a response to the increased potential for interspecific competition in the mixed-species associations which these monkeys frequently form ...
Like other Doucs, the red-shanked douc is a long, slender monkey. The male has a head and body length of 55–82 centimetres (22–32 in) with a tail that measures 56–74 centimetres (22–29 in), and the female is between 60–63 centimetres (24–25 in) long with a tail that measures 44–60 centimetres (17–24 in) long.
Miller's langur is a leaf monkey within the family Cercopithecidae and subfamily Colobinae. [2] It was formerly considered a subspecies of Hose's langur, Presbytis hosei (as Presbytis hosei canicrus). [3] [2] [4] [5] It was split from P. hosei on the basis of different morphology by primatologists Colin Groves and Christian Roos. [3] [6]
A female De Brazza's monkey grooms a male. The De Brazza's monkey is the most sexually dimorphic species of guenon; males weigh around 7 kilograms, while females weigh around 4 kilograms. Adults have grey agouti fur with a reddish-brown back, black limbs and tail, and a white rump. Both sexes have cheek pouches they use to carry food while they ...
The diet of red colobus monkeys consists mainly of young leaves, flowers, and unripe fruit. [13] They are also known to eat charcoal or clay to help combat the cyanide some leaves may contain.