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Black-Handed Spider Monkey Fact File

Appearance

The black handed spider monkey is named for the long, ‘spider’ like limbs which allow them to move through the trees gracefully. Their hands are thumbless turning them in to a simple hook which can easily grab branches. The feet have an opposable big toe to help with grabbing branches.

They have a long, prehensile tail which acts as a fifth limb to help them move through the trees. It may also be used for picking items up. This tail measures 63-84cm (24.8-33.1in) long.

On the hands and feet of all individuals they have black fur. The rest of their body fur varies between individuals from black to a light buff or reddish-brown.

The face is hairless around the eyes and muzzle.

Their body length is between 30.5 and 63cm (12 and 24.8in) long. An average black handed spider monkey may weigh 6-9kg (13.2-19.8lbs).

Diet

Black handed spider monkeys are omnivorous. They feed on a range of fruits, nuts, seeds, buds, flowers, insects and eggs. Fruit is the main food source and may make up as much as 80% of their diet.


They perform the role of a seed disperser in their environment.


Water can be obtained from terrestrial sources but also from water in tree hollows or gathered on leaves. It can also be obtained from their food.

black-handed spider monkey

Scientific Name

Ateles geoffroyi

Conservation Status

Endangered

Weight

6-9kg (13.2-19.8lbs)

Length

30.5-63cm (12-24.8in)

Lifespan

47 years

Diet

Omnivorous

Range

Central and South America is the native home of the spider monkey. Here they can be found throughout Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua and Panama.

Habitat

They make their home in a wide variety of forest habitats including mangrove, deciduous, cloud and tropical forests.

black-handed spider monkey

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Reproduction

Black handed spider monkeys have no breeding season and mating can take place at any time of the year. Females have an estrous cycle of 24 to 27 days with mating taking place across a 2-3 day period.

Dominant males will breed more often than subordinates.

Females have an enlarged clitoris which is evident when looking at them and males touch this and then use the smell to determine the reproductive status of a potential mate.

Following a successful mating the female will give birth after a 226-232 day gestation period.

At birth the infant will weigh 426g (15oz). For the first four months of their life they are carried by the mother on their abdomen and then they move on to the back. While travelling the infant and mother will intertwine their tails.

When juveniles start to move through the trees they cannot stretch between trees due to their shorter limbs. To help this an adult will stretch out and form a bridge that the infant can cross.

Infants will be dependent on their mothers for 3 years. While the mother is lactating ovulation is suppressed and she is unable to breed.

Females mature at four years old with males maturing slightly later at five years old. Males remain in their group but females will leave at maturity.

Behavior

They form family groups which average 30 members though on rare occasions groups have been found with 100 members. When groups are at their largest they may spend only a few weeks together as a whole and split in to smaller groups for the rest of the year.

Black handed spider monkeys are active by day. Most of their activity such as feeding takes place in the morning. Afternoons are typically used for resting.

Groups of black handed spider monkeys split in to smaller parties to go out to find food.

They have been observed applying ground lime tree leaves mixed with saliva to their fur and this acts as insect repellent.

Black handed spider monkeys make a range of vocalizations including a bark if threatened or a whinny if they become separated from their group.

black-handed spider monkey

Predators and Threats

Adult black-handed spider monkeys have few natural predators. The main ones are the jaguar and the puma. Eagles and large snakes may hunt adults and young.

Humans affect the populations of black handed spider monkeys mainly through hunting. This has led to local extinctions in some parts of their range. Hunting takes place both for the bush meat trade and the pet trade.

Another threat is deforestation with the spider monkey not being largely tolerant of habitat degradation.

The long period between offspring means recovery for this species after population declines will take a long time.

Quick facts

They are also known as Geoffery’s spider monkey or the central American spider monkey.

The Ateles portion of their scientific name comes from a word meaning ‘imperfect.’ This is a reference to their vestigial thumb.

They are considered to be among the world’s most intelligent primate species.

black-handed spider monkey

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Photo Credits

Copyright. The Animal Facts.

References

Burnie, D., 2011. Animal. 3rd ed. London: DK

Cortes-Ortíz, L., Canales Espinosa, D., Marsh, L.K., Mittermeier, R.A., Méndez-Carvajal, P., Rosales-Meda, M., Solano, D. & Williams-Guillén, K. 2020. Ateles geoffroyi. The IUCN Red List of Threatened Species 2020: e.T2279A17929000. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T2279A17929000.en. Downloaded on 13 August 2020.

Genomics.senescence.info. 2020. Central American Spider Monkey (Ateles Geoffroyi) Longevity, Ageing, And Life History. [online] Available at: <https://genomics.senescence.info/species/entry.php?species=Ateles_geoffroyi> [Accessed 13 August 2020].

New England Primate Conservancy. 2020. Geoffroys Spider Monkey. [online] Available at: <https://www.neprimateconservancy.org/geoffroys-spider-monkey.html> [Accessed 13 August 2020].

Central Florida Zoo & Botanical Gardens. 2020. Black-Handed Spider Monkey Attraction | CFZ Animals. [online] Available at: <https://www.centralfloridazoo.org/animals/black-handed-spider-monkey/> [Accessed 13 August 2020].

Torontozoo.com. 2020. Toronto Zoo | Animals. [online] Available at: <http://www.torontozoo.com/animals/Black-handed%20spider%20monkey> [Accessed 13 August 2020].

Gorog, A. 2002. "Ateles geoffroyi" (On-line), Animal Diversity Web. Accessed August 13, 2020 at https://animaldiversity.org/accounts/Ateles_geoffroyi/

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