Animal Age

How old does a Hamlyn’s monkey get? (age expectancy)

What is the maximal age a Hamlyn’s monkey reaches?

An adult Hamlyn’s monkey (Cercopithecus hamlyni) usually gets as old as 13.5 years.

When born, they weight 468 grams (1.03 lbs) and measure 2.9 cm (0′ 2″). As a member of the Cercopithecidae family (genus: Cercopithecus), their offspring is 1 babies per pregnancy. Fully grown, they reach a bodylength of 28 cm (1′ 0″).

As a reference: Usually, humans get as old as 100 years, with the average being around 75 years. After being carried in the belly of their mother for 280 days (40 weeks), they grow to an average size of 1.65m (5′ 5″) and weight in at 62 kg (137 lbs), which is obviously highly individual.

A Hamlyn's monkey gets as old as 13.5 years

The Hamlyn’s monkey (Cercopithecus hamlyni), also known as the owl-faced monkey, is a species of Old World monkey that inhabits the bamboo and primary rainforests of the Congo. This species is exceedingly rare and known only from a few specimens; little is known about it. However these specimens tend to be widely dispersed throughout the eastern part of Congo, from the Epulu River to the Lukuga River and from the Congo River to the Kabale Forest, with one example in northwestern Rwanda. Geographically it corresponds quite closely to another species of monkey, L’Hoest’s monkey C. lhoesti. It travels on the ground, and researchers think that it may be awake primarily by night.Schwarz (1928) grouped this species with C. l’hoesti, while Elliot (1913) noted its distinctive cusp pattern on the third molar, and reassigned it to a separate genus, Rhinostigma. This he believed to be an intermediate between Cercopithecus and Cercocebus. Hamlyn’s monkey has one subspecies other than the nominate. In weight, the male is much larger than the female, with the average adult weighing 7 to 10 kg, while females weigh on average 4.5 to 6 kg. It is thought to be a frugivore-folivore in diet. Some published reports indicated that Hamlyn’s Monkey lives in small groups, of ten members or less, with one male and multiple females, with no data to show them occurring in monogamous groups. The species has been found only in higher elevations, above 900m and up to 4600m. In color it is generally dark gray, with a characteristic white stripe which extends from the root of the nose to the upper lip, giving it an owl-like appearance, hence the name “owl-faced monkey”. The name “Hamlyn’s monkey” and the scientific epithet “hamlyni” come from the animal dealer who first brought this species to the London Zoo. It has scent glands on its chest with which it marks its territory. Both sexes have bare, blue buttocks, and the mature male has bright red and blue genitals. The juvenile coloration is a yellow-brown coat and a pink face. In captivity it has been known to live for about 33 years. Like others of this genus, it covers a wide area in its daily travels, mostly in a search for food.

Animals of the same family as a Hamlyn’s monkey

Not really brothers and sisters, but from the same biological family (Cercopithecidae):

Animals that reach the same age as Hamlyn’s monkey

With an average age of 13.5 years, Hamlyn’s monkey are in good companionship of the following animals:

Animals with the same number of babies Hamlyn’s monkey

The same number of babies at once (1) are born by:

Weighting as much as Hamlyn’s monkey

A fully grown Hamlyn’s monkey reaches around 2.31 kg (5.09 lbs). So do these animals:

Animals as big as a Hamlyn’s monkey

Those animals grow as big as a Hamlyn’s monkey: