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Home -> Kingdom Animalia -> Phylum Chordata -> Subphylum Vertebrata -> Class Mammalia -> Order Dasyuromorphia -> Family Myrmecobiidae -> Species Myrmecobius fasciatus

Myrmecobius fasciatus
numbat



2008/07/20 06:31:05.917 GMT-4

By Eric J. Ellis

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Dasyuromorphia
Family: Myrmecobiidae
Genus: Myrmecobius
Species: Myrmecobius fasciatus

Geographic Range

Formally, southwest to southcentral Australia east to southwest New South Wales. Now restricted to the western portion of this range, southwestern West Australia.

Biogeographic Regions:
australian (native ).

Habitat

Numbats generally inhabit eucalypt forests and other dry, open woodlands where fallen, dead trees are present.

Terrestrial Biomes:
forest .

Physical Description

Mass
280 to 550 g; avg. 415 g
(9.86 to 19.36 oz; avg. 14.61 oz)


Basal Metabolic Rate


Body length is 175 to 275mm. Tail length is 130 to 170mm. Their weight ranges from 280 to 550 grams. The anterior end of the body is brownish/gray with traces of white. There is a black stripe along the head. Numbats have a pointed snout with a small mouth and a long, sticky tongue that can reach as far as 100mm from the mouth opening. The teeth are very small, numerous, and often asymmetrical. The palate extends far back along the skull, a modification seen in other "long-tongued" mammal species such as scaly anteaters (pangolins, mammalian order Pholidota) and armadillos (mammalian family Dasypodidae). The hair is short and thick, especially on the tail. Along the back numbats have 6 or 7 vertical white lines that are in contrast with a background of darker fur. The front legs are stout and all four feet have large, thick claws. Females have 4 mammae and lack a pouch. Numbats are considered to have a relatively large brain.

Some key physical features:
endothermic ; bilateral symmetry .

Reproduction

Numbats breed between December and April. They breed once yearly, the typical litter size is 2 to 4. During the time they are attached to the mothers mammae, around 4 months, they are exposed to the elements because the female lacks a pouch. They are protected only by her long hair. There is some evidence that the female digs a tunnel to give birth in. In July or August mother numbats leave their young in a burrow, leaving them to forage during the day and returning to suckle them at night. By October the young are typically beginning to forage for termites. The young stay with the mother for about 9 months, dispersing in December.

Key reproductive features:
gonochoric/gonochoristic/dioecious (sexes separate); sexual .

Behavior

Numbats are mainly active during the day. They spend the majority of their time searching for food and are considered a solitary species (except during the breeding season). They are territorial, occupying territories of up to 150 hectares in size, and forage alone. Numbats are agile, can easily climb trees, and are often seen basking in the sun.

Key behaviors:
motile .

Food Habits

Numbats consume mainly ants and termites that are found in decaying tree material on the forest floor. They get to this food source by clawing through the dead logs and using their highly specialized tongue to probe the galleries of termite colonies. Numbats are the only marsupials that feed strictly on social insects.

Economic Importance for Humans: Negative

No documented examples.

Economic Importance for Humans: Positive

Numbats are unique and important members of the ecosystems in which they live, they act as important predators of social insects.

Conservation Status

IUCN Red List: [link]:
Vulnerable.

US Federal List: [link]:
Endangered.

CITES: [link]:
No special status.

Numbat populations have declined severely since western colonization of Australia. They once occurred throughout much of southern arid and semi-arid Australia, from New South Wales through South Australia and southern Northern Territory to southwestern Western Australia. They are now restricted to several remnant populations in southwest Western Australia, including one population that is the result of a reintroduction effort.

Numbats have been severely affected by agriculture; clearing land eliminates the habitat (dead trees) of their food source (termites). They have also been affected by introduced predators such as foxes, cats, domestic dogs, and dingos. They may also have suffered from the suppression of Aboriginal fire regimes in arid grasslands, which made the habitat more suitable for them.

Numbats are considered vulnerable by the IUCN and endangered under the U.S. Endangered Species Act.

Other Comments

Captive numbats have been recorded living for as long as 6 years.

Contributors

Eric J. Ellis (author), University of Michigan.

References

Lee, Anthony K., and Cockburn, Andrew. Evolutionary Ecology of Marsupials. Cambridge University Press, 1985.

Nowak, Ronald M., and Paradiso, John L.. Walker's Mammals of the World, 4th Edition. The Johns Hopkins University Press, 1983.

Taylor, J. Mary.. The Oxford Guide to Mammals of Australia. Oxford University Press, 1984.

Massicot, P. 2002. "Animal Info - Numbat" (On-line). Accessed April 2, 2003 at http://www.animalinfo.org/species/myrmfasc.htm.

2008/07/20 06:31:07.423 GMT-4

To cite this page: Ellis, E. 2003. "Myrmecobius fasciatus" (On-line), Animal Diversity Web. Accessed July 25, 2008 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Myrmecobius_fasciatus.html.

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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