Panamanian night monkey

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Panamanian night monkey[1]

Near Threatened  (IUCN 3.1)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Aotidae
Genus: Aotus
Species:
A. zonalis
Binomial name
Aotus zonalis
Distribution of Aotus zonalis

The Panamanian night monkey or Chocoan night monkey (Aotus zonalis) is a species of

Chocó region of Colombia. There are also unconfirmed reports of its occurrence in Costa Rica, especially on the Caribbean coast of Costa Rica.[3] The species definitely occurs in the Atlantic lowlands of Panama close to the Costa Rica border.[4]

The exact classification of the Panamanian Night Monkey is uncertain. While some authors consider it a subspecies of the gray-bellied night monkey, A. lemurinus, other authors follow a study by Thomas Defler from 2001, which concluded that it is a separate species, A. zonalis.[2][3][5]

The Panamanian night monkey is a relatively small monkey, with males weighing approximately 889 grams (31.4 oz) and females weighing about 916 grams (32.3 oz).

braincase, a depressed interorbital region, and large molariform teeth.[8]

Like other

nocturnal lifestyle. But unlike many nocturnal animal species, its eyes do not have a tapetum lucidum. Also like other night monkeys, it has a short tail relative to the body size.[7]

The Panamanian night monkey is

nocturnal.[6] It and the other members of the genus Aotus are the only nocturnal monkeys.[9] It is found in several types of forest, including secondary forest and coffee plantations.[7] It lives in small groups of between two and six monkeys, consisting of an adult pair and one infant and several juveniles and/or subadults.[6] Groups are territorial, and groups occupy ranges that overlap only slightly.[6]

Vocal,

piloerection have been noted.[7]

The Panamanian night monkey generally walks on all four legs, although it is capable of leaping or running when necessary.[7] It eats a variety of foods. In one study, on Barro Colorado Island in Panama, its diet was found to consist of 65% fruits, 30% leaves and 5% insects.[6]

In common with other night monkeys, the Panamanian night monkey is one of the few monogamous monkeys.[6] The monogamous pair generally gives birth to a single infant each year, although twins occasionally occur.[7] The gestation period is about 133 days.[7] The father carries the infant from the time it is one or two days old, passing it to the mother for nursing.[7]

Although viewing monkeys is popular with tourists visiting Panama, the Panamanian night monkey's nocturnal habits make it less often seen than the other Panamanian monkey species. However, with a skilled guide it is possible to observe the Panamanian night monkey.[10]

References