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Overview
Distribution
Range Description
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Geographic Range
Northern tamanduas are found in Central and South America, from southeastern Mexico south throughout Central America, and in South America west of the Andes from northern Venezuela to northern Peru.
Biogeographic Regions: neotropical (Native )
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Physical Description
Morphology
Physical Description
Tamandua mexicana is much smaller than giant anteaters (Myrmecophaga tridactyla). Head and body length ranges from 470 to 770 mm and tail length from 402 to 672 mm. Northern tamanduas are fawn to brownish colored and have a distinct, black "V" going down their backs. One of their names, vested anteaters, is derived from this "V" as it makes the anteater appear to be wearing a vest. Northern tamanduas always have this vivid, black "vest" on their trunk that continues from the shoulders to the rump. Southern tamanduas, northern tamandua's closest relative, only has this "V" in some specimens from the southeastern portion of their range, the part of their range which is farthest from the range of northern tamanduas. Sometimes the two species can only be distinguished by characters of the skull.
Pelage of T. mexicana is short, coarse, dense, and very bristly. The mouth opening is only about the diameter of a pencil, but the tongue can extend 40 cm. The tail is naked and prehensile, with irregular, black markings. On each hand there are four clawed digits. These claws range from 4 to 10 cm in length and are used for defense and slashing open termite and ant nests. The claw on the third digit is the longest, and the claw on the first digit is the smallest. The feet each have five clawed digits. The ears are large and protruding, but the eyes are very small.
Range mass: 2 to 7 kg.
Other Physical Features: endothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: sexes alike
Average basal metabolic rate: 5.124 W.
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Ecology
Habitat
Habitat and Ecology
Systems
- Terrestrial
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Habitat
Northern tamanduas live in many different habitats from mature and secondary rainforests and plantations to gallery forests and arid savannas. Tamanduas forage both on the ground and in the canopy of the forest. They are most common beside streams and trees with abundant vines and epiphytes, perhaps because these trees are more likely to house ant and termite nests. When they are not active, they rest in hollow trees, burrows of other animals, or natural shelters. In the Republic of Panama, northern tamanduas are often spotted swimming between islands.
Habitat Regions: tropical ; terrestrial
Terrestrial Biomes: savanna or grassland ; forest ; rainforest ; scrub forest
Other Habitat Features: riparian
- Primate Refuge and Sanctuary of Panama, 2001. "Fauna of the Islas Tigre and Islas Brujas" (On-line). Accessed April 23, 2001 at www.fsu.edu/~cppanama/ipsp/fauna.htm.
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Trophic Strategy
Food Habits
Northern tamanduas are specialized to eat termites and ants. Since they are mostly arboreal, northern tamanduas eat mostly ants and termites that nest in the trees. They detect their prey by scent. They have developed an aversion to leaf-eating ants, army ants, and other ants that produce chemical defenses. They also can tell the difference between different castes in the termite society. They will not eat soldiers of certain noxious termites, but will search out the defenseless workers of the same species and eat them. Northern tamanduas have also been seen eating bees and their honey. In captivity they will eat fruit and meats.
Tamandua mexicana individuals on Barro Colorado Island were estimated to eat more than 9,000 ants per day.
Since they lack teeth, their stomach is portioned to include a muscular gizzard, much like that of some birds. Their tongue is coated with a sticky saliva and backward facing projections that ensnare the ants and termites.
When they eat, they noisily rip and tear insect nests and rotten wood apart. At night, sounds of tearing wood will often lead to a northern tamandua.
Animal Foods: insects
Primary Diet: carnivore (Insectivore )
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Associations
Predation
If northern tamanduas are in a tree and are attacked by a predator, they protect themselves by getting into a tripod position that is formed by the back legs and tail. They stretch their arms out and thrash their formidable claws at the enemy. If they are attacked while they are on the ground, they protect their back by leaning against a tree or rock and grab their enemy with their strong arms. Either way, their protection is their strong forearms and the shearing power of their claws. Northern tamanduas may be preyed on by jaguars, large snakes, and eagles.
Known Predators:
- jaguars (Panthera onca)
- large snakes (Serpentes)
- harpy eagles (Harpia harpyja)
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Life History and Behavior
Behavior
Communication and Perception
Northern tamanduas use their sense of smell extensively to find food. Like most mammals, they probably also use chemical cues in communication.
Communication Channels: chemical
Perception Channels: visual ; acoustic
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Life Expectancy
Lifespan/Longevity
Average lifespan
Status: captivity: 9.5 years.
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Lifespan, longevity, and ageing
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Reproduction
Reproduction
Little is known of reproduction in northern tamanduas. They mate in the fall and give birth to a single young in the spring. Births of twins have also been recorded. Females are polyestrous, with a gestation period of either 130 to 150 days or 160 to 190 days. Mothers carry their young on their back or flanks. They will set their young on a tree branch when feeding. Young stay with their mother for about a year before dispersing.
Breeding interval: Northern tamanduas breed once yearly.
Breeding season: Northern tamanduas breed in the fall.
Range number of offspring: 1 to 1.
Range gestation period: 130 to 190 days.
Average age at sexual or reproductive maturity (female): 1 years.
Average age at sexual or reproductive maturity (male): 1 years.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); viviparous
Tamandua females carry, protect, and nurse their young until they are weaned. Young tamanduas also remain with their mother until they have reached about one year old.
Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Protecting: Female)
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
Red List Criteria
Version
Year Assessed
Assessor/s
Reviewer/s
Contributor/s
Justification
History
- 2006Least Concern(IUCN 2006)
- 1996Lower Risk/least concern
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Conservation Status
Northern tamandua populations are not currently considered at risk. However, populations throughout most of their range may be impacted by habitat destruction.
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern
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Trends
Population
Population Trend
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Threats
Threats
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Management
Conservation Actions
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Relevance to Humans and Ecosystems
Benefits
Economic Importance for Humans: Negative
No known negative affects of northern tamanduas on humans.
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Economic Importance for Humans: Positive
Northern tamanduas control populations of ants and termites which may potentially damage crops and orchards.
Positive Impacts: controls pest population
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Wikipedia
Northern tamandua
The northern tamandua (Tamandua mexicana) is a species of tamandua, a small anteater in the family Myrmecophagidae. They live in tropical and subtropical forests from southern Mexico, through Central America, and to the edge of the northern Andes.[2]
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Description
The northern tamandua is a medium-sized anteater with a prehensile tail, small eyes and ears, and a long snout. The fur is pale yellow over most of the body, with a distinctive patch of black fur over the flanks, back, and shoulders, that somewhat resembles a vest in shape. The presence of this colouration pattern makes it possible to distinguish these species from its southern relative, which has a more uniform colour.[3] The tail has fur on its upper surface for about a third of its length, but is otherwise hairless. The hind feet have five toes, while the fore feet have only four.
Males and females are similar in size and colour, and range from 102 to 130 centimetres (40 to 51 in) in total length, including the 40 to 68 centimetres (16 to 27 in) tail. Adults weigh between 3.2 to 5.4 kilograms (7.1 to 12 lb).[4]
Like other anteaters, the northern tamandua is highly adapted to its unusual diet. The tongue is long, extensible, and covered in sticky saliva able to pick up ants and termites. It has unusually well developed muscles, attached to a large hyoid bone and rooted to the top of the sternum. The entire oral cavity is modified to accommodate this tongue, and is so elongated that the back of the soft palate is level with the fifth cervical vertebra near the base of the neck, rather than at the top of the pharynx as in most other mammals.[5] The jaw muscles and mandible are reduced, and the latter is particularly fragile. Like other anteaters, the northern tamandua has no teeth.[4]
In addition to its diet, and unlike the giant anteater, the northern tamandua is also adapted to an arboreal lifestyle. The muscles of the toes and the presence of a tough pad on the palms makes the forefeet prehensile, enabling them to grip onto projections as it climbs. The middle toe of the forefeet also bears an unusually large claw, and the toe has enough muscle and leverage to allow it to rip open wood to get at the ants within.[4]
Distribution and habitat
The northern tamandua inhabits forests from southern Mexico, through Central America to western Colombia, Venezuela, and Ecuador, and the northwestern corner of Peru.[2] It has been reported from various types of forest within this region, including evergreen, deciduous, mangrove swamps, cloud forests, and secondary forest. Four subspecies are currently recognised:[4]
- Tamandua mexicana mexicana - Mexico, Guatemala, Belize, Honduras, El Salvador
- Tamandua mexicana instabilis - Venezuela, northern Colombia
- Tamandua mexicana opistholeuca - Nicaragua, Costa Rica, Panama, most of Colombia
- Tamandua mexicana punensis - Ecuador, Peru
Behaviour
The northern tamandua is mainly nocturnal, but is also often active during the day, and spends only around 40% of its time in the trees. They are active for about eight hours each day, spending the rest of the time sheltering in hollow trees. They are solitary animals, occupying home ranges of between 25 and 70 hectares (62 and 170 acres). Known predators include jaguars and harpy eagles.[4]
Northern tamanduas subsist almost entirely on a diet of ants and termites, although they have also been observed to eat small quantities of fruit. They prefer relatively large insects, over 4 millimetres (0.16 in) in length, and including Camponotus, Azteca, Crematogaster, and Nasutitermes, among others. They may eat up to 9,000 insects per day, from fifty to eighty different nests[4], which they locate by scent and then dig into with their powerful claws. They extract the ants with their long, narrow, and sticky tongue, but seem to do little permanent damage to the nests, perhaps because they do not spend long at each one before being driven away by the insects' natural defences.[4]
The anteaters can communicate with each other by leaving scent marks with their anal scent glands, but although infants can be quite vocal, adults rarely make any sounds. If provoked, they can prop themselves up on their hind legs and tail using a tree or rock for support, and lash out with their claws.[4]
Reproduction
There is no defined breeding season for northern tamanduas, and females appear to be able to enter oestrus at any time of year. Males locate fertile females by scent, and court them with repeated sniffing and swatting with their claws. Eventually, they use their strong forelimbs and tail to secure the female while they mate.[6] Gestation lasts from 130 to 190 days, and results in the birth of a single offspring. The young anteater initially shelters in a nest in a hollow tree, but later moves about by clinging to its mother's back. Young leave the mother at about a year of age, and northern tamanduas have been reported to live up to nine and a half years in captivity.[4]
References
- ^ Gardner, Alfred L. (16 November 2005). "Order Pilosa (pp. 100-103)". In Wilson, Don E., and Reeder, DeeAnn M., eds. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). pp. 102-103. ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3/browse.asp?id=11800043.
- ^ a b c Miranda, F. & Superina, M. (2010). "Tamandua mexicana". IUCN Red List of Threatened Species. Version 2011.1. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/21349. Retrieved 30 September 2011.
- ^ "San Diego Zoo's Animal Bytes: Tamandua or Lesser Anteater." Welcome to the San Diego Zoo. 2009 Zoological Society of San Diego. 16 Aug. 2009
- ^ Reiss, K.Z. (1997). "Myology of the feeding apparatus of myrmecophagid anteaters (Xenarthra: Myrmecophagidae)". Mammalian Species 4 (1): 87–117. doi:10.1023/A:1027366129277.
- ^ D. Matlaga (2006). "Mating behavior of the northern tamandua (Tamandua mexicana) in Costa Rica". Edentata 7: 46–48. doi:10.1896/1413-4411.7.1.46.
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