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Common marmosets are very small monkeys with relatively long tails. Males are slightly larger than females; males have an average height of 188 mm (7.40 in) and females have an average height of 185 mm (7.28 in). Males weigh 256 g (9.03 oz) on average and females weigh 236 g (8.32 oz) on average. [10]
The western pygmy marmoset (Cebuella pygmaea) is a marmoset species, a very small New World monkey found in the northwestern Amazon rainforest in Brazil, Colombia, Ecuador, and Peru. It was formerly regarded as conspecific with the similar eastern pygmy marmoset, which has whitish underparts.
Debate has arisen among primatologists concerning the proper genus in which to place the pygmy marmoset. An examination of the interstitial retinol binding protein nuclear gene (IRBP) in three marmoset species showed that Callithrix as constructed in the 1990s also needed to include C. pygmaea to be monophyletic, and that the times of separation of pygmaea and the argentata and jacchus species ...
Popa langurs are small monkeys that only weigh around 15 pounds. They measure 20–23 inches from the head to the base of the tail. Their tails are longer than their bodies at around 31 inches.
The eastern pygmy marmoset (Cebuella niveiventris) is a marmoset species, a very small New World monkey, found in the southwestern Amazon Rainforest in Bolivia, Brazil, Ecuador, and Peru. It was formerly regarded as conspecific with the similar western pygmy marmoset , but the eastern pygmy marmoset has whitish colored underparts.
They are very expressive creatures, using a variety of vocalizations and gestures. ... “But, in the last five to 10 years, they’re almost exclusively small monkeys.” ...
The bald uakari (Cacajao calvus) or bald-headed uakari is a small New World monkey characterized by a very short tail; bright, crimson face; a bald head; and long coat. [4] The bald uakari is restricted to várzea forests and other wooded habitats near water in the western Amazon of Brazil and Peru. [2]
The smaller marmosets venture into the very top of forest canopies to hunt insects that are abundant there. [7] Marmosets use chirps, trills, and "phee" calls to communicate with each other. "Phee" calls are long-distance vocalizations that help monkeys identify each other's locations.