Alouatta seniculus have the widest geographical distribution of all the New World primates. Red howler monkeys range throughout the northern half of South. Genus, Alouatta Lacépède, Species, Alouatta seniculus (Linnaeus, ) – red howler monkey, Colombian Red Howler, Venezuelan Red Howler. Genus: Alouatta Species: A. macconnelli, A. sara, A. seniculus. Subspecies: A. seniculus arctoidea, A. seniculus juara, A. seniculus seniculus. Other names: A.

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Due to such an unbalanced sex ratio, fierce sexual competition exists between and within red howler troops. By using this site, you agree to the Terms of Use and Privacy Policy. Authentication This information is awaiting authentication by a species expert, and will be updated as soon as possible.

The species is also an important seed dispersal mechanism for the plants which it consumes Andresen Also at Tinigua, fruit abundance goes up during the beginning of the wet season March-May and during the dry season December-February Stevenson et al.

ADW: Alouatta seniculus: INFORMATION

The position of the foramen magnum is very posterior seeniculus make way for the expanded jaw and enlarged hyoid bone. If you are able to help please contact: This page was last edited on 15 Septemberat Alouatta seniculus red howler monkey Facebook.

In these instances, the females are extremely gentle with the little ones, touching them with their muzzles and hands. Because of their low-sugar diets, conservation of energy is key. Average weights for males can range between 6 and 7.

Revista Brasileira de Zoologia. Accessed December Connect with us Help us improve the site by taking our survey.

Red howlers spend the night in the canopy, huddled in groups Soini This way, one troop can constantly inform another of its precise location, thus avoiding an energetically costly squabble over resources.

Usually the group will simultaneously defecate from the same tree or group of trees, a behavior that usually occurs in the morning after waking up and at midday after the resting period Braza et al. Thus, at some times during the year, the species can be described as predominantly folivorous while at other times they are predominantly frugivorous for an example see Simmen et al.


Typically, it is females without infants of their own that are attracted to these infants. Wikimedia Commons has media related to Alouatta seniculus. Sexual dimorphism of weight ranges between populations, but males are larger than females with females averaging between 69 and 95 percent of the body weight of the male Thornington et al.

Alouatta seniculus also improve their digestive efficiency by feeding primarily on tender young leaves and on some species of leaves that are unusually nutritious. When attempting to attract a male, the female approaches him and moves her tonque rhythmically.

IUCN Red List of Threatened Species

Mammal Species of the World: Head and body length in adults averages Extant species of family Atelidae. Share this image — Hide sharing options.

Red howlers can be found in a large variety of habitats within its range. We are not responsible for the content of linked sites, nor does inclusion of a link imply endorsement of the views expressed in that content. Red howler males, which are expelled from their natal troop upon reaching sexual maturity, are forced to invade an outside group and gain admittance. The altitudinal limit of the red howler distribution is m However, in two qlouatta in Venezuela, the birth frequency is reduced during the early wet season, May through July.

The ADW Team srniculus acknowledges their support. Alouatta macconnelli Alouatta sara Alouatta seniculus Red howlers are found only in neotropical South America.

There is some indication that home ranges are stable Izawa senidulus. In Venezuela during the dry season, activities on a daily basis consisted of sleeping Terms of Use – The displayed portlet may be used as a link from your website to Arkive’s online content for private, scientific, conservation or educational purposes only.


International Union for Conservation of Nature. Red howler monkeys do not need to drink water and thus can live in areas away from natural water Crockett b. Its preferred method of locomotion is quadrupedal walking with minimal leaping. Conservation Status Although several other Alouatta species are endangered, A.

Variation in the darkness of the red pelage exists between locations and may reflect climatic variables Thorington et al.

Therefore, a female reaches sexual maturity a couple of years before a male. In addition, they have complex stomachs to aid in the digestive process. Coiba Island howler A. In response to heavy rains, they howl, either at the onset, or often at the sound of approaching rain, and sit hunched over until the rain ends Clutton-Brock, !

Venezuelan red howler

The Animal Diversity Web is an educational resource written largely by and for college students. Due to their relatively large size, A. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. In general, red howlers prefer medium or large fruits with juicy pulp and that are alouayta in color Julliot a. Narrow incisors aid in the ingestion of the leaves, and molars with sharp, shearing crests help them to better chew their food.

Red howlers are found only in neotropical South America. In one study in the Andes at an altitude of m In addition, they eat sugary fruits and flowers when these are available, but can sustain themselves for weeks at a time on only leaves, providing these are high in quality. Yellow-tailed woolly monkey O.

Suspensory postures are typically seen during feeding and rarely during resting, and normally consist of tail suspension.