Rufous rat-kangaroo

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Rufous rat-kangaroo [1]
Rufous Bettong (Aepyprymnus rufescens) (9855539716).jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Potoroidae
Subfamily: Potoroinae
Genus: Aepyprymnus
Garrod, 1875 [3]
Species:
A. rufescens
Binomial name
Aepyprymnus rufescens
(J. E. Gray, 1837) [4]
Rufous Bettong IUCN Range.png
Distribution of the rufous rat-kangaroo

The rufous rat-kangaroo or rufous bettong (Aepyprymnus rufescens) is a small, jumping, rat-like marsupial native to eastern Australia. It is the only species in the genus Aepyprymnus. The largest member of the potoroo/bettong family (Potoroidae), it is about the size of a rabbit. The rufous rat-kangaroo is active at night when it digs for plant roots and fungi, and like other marsupials it carries its young in a pouch. Though its range is reduced, the population is healthy and stable. [2]

Contents

Taxonomy

The rufous rat-kangaroo is the only member of its genus, and is the largest of all the potoroids. It is generally grey with a hint of reddish brown and its scientific name means "reddish high-rump". [5] It was once thought of as a solitary, nocturnal animal, but recent observation indicates that the rufous rat-kangaroo may form loose, polygynous associations. [5] It feeds mostly on tubers and fungi, but also on leaves and other vegetation. [6]

Description

A species of the family Potoroidae (potoroos & bettongs), small to medium marsupials that include the living Potorous (potoroos) and Bettongia (bettongs). They are not closely related to others of the family, and the largest extant potoroine species, and their characteristics have them placed within a monotypic genus.

Aepyprymnus rufescens is distinguished by the ruffled and bristly hair of the pelage and rufous tint of the fur at the upper parts. The hair across the back is predominantly grey, the rufous tinge more evident, and is interspersed with silvery hairs. An indistinct stripe appears at the hip line. The underparts are also grey, although paler. The combined head and body length is 385 to 390 millimetres. The tail may be from 340 to 390 mm in length, and excepting a white tip that may appear the colour is overall grey-brown. The ears are comparatively long, 48 to 57 mm, with a triangular form. The colour of the ears is very dark at the outer side and pink at the interior, the fringe is lined with silver hairs. A hairless pink rim appears around the eye. The weight range is from 2.5 to 3.5 kilograms. [7]

A similar species, the northern Bettongia tropica , may be distinguished by the lack of shaggy fur with a rufous tinge, their blackish tail, and this species hairless pink ring at the eye and pointy triangular ears. [7]

The vocalisation includes an alarm call, a soft hissing sound, another sound like a chainsaw when in aggressive postures and they regularly emit a grunting noises during normal activity. [7]

Reproduction

Breeding occurs throughout the year, once the female has reached maturity, generally at 11 months. The male reaches maturity between 12 and 13 months. Once mature, the female is capable of breeding at three-week intervals. The gestation of the young is about 22–24 days. After the young are born, they live within the pouch for about 16 weeks. Upon leaving the pouch, the joey stays near the mother for about 7 weeks, while it gets used to fending for itself. [5]

Behaviour

The species may share nests or be solitary, a male may cohabit with one or two females. The nest is located beneath a dense under-story of vegetation, a shallow clearing that is matted with woven plant material. The foraging activity is strictly nocturnal, they will only emerge after sunset and return to the nest before first light. The posture varies with the activity of the species, assuming an upright position on the hind parts to survey its surroundings, drawing the forelimbs to the chest when hopping rapidly away from a threat, and resting on all four limbs and the tail when slowly moving during feeding. [7]

The favoured foods are subterranean fruiting bodies of fungi and tubers, and the species have strong clawed forelimbs that allow them to excavate these. Other foodstuffs consumed include some insect larvae, the stems of sedge-like plants, grasses and seeds. [7]

The museum collector Charles M. Hoy noted that the species entered his camp at night, eating pieces of bread but ignoring the vegetable scraps. [8]

Distribution and habitat

It is found in coastal and subcoastal regions from Newcastle in New South Wales to Cooktown in Queensland, and was formerly found in the Murray River Valley of New South Wales and Victoria. [7] [6]

Related Research Articles

<span class="mw-page-title-main">Broad-faced potoroo</span> Extinct species of marsupial

The broad-faced potoroo is an extinct potoroid marsupial that was found in southwestern Australia. The first specimen was collected in 1839, and described by John Gould in 1844. Only a small number of specimens have been collected since. The last live capture was in 1875. Subfossil remains indicate that it had an extensive distribution around the semiarid coastal districts of Southwest Australia.

<span class="mw-page-title-main">Potoroidae</span> Family of marsupials

Potoroidae is a family of marsupials, small Australian animals known as bettongs, potoroos, and rat-kangaroos. All are rabbit-sized, brown, jumping marsupials and resemble a large rodent or a very small wallaby.

<span class="mw-page-title-main">Woylie</span> Species of marsupial

The woylie or brush-tailed bettong is a small, critically endangered mammal native to forests and shrubland of Australia. A member of the rat-kangaroo family (Potoroidae), it moves by hopping and is active at night, digging for fungi to eat. It is also a marsupial and carries its young in a pouch. Once widespread, the woylie mostly died out from habitat loss and introduced predators such as foxes. It is currently restricted to two small areas in Western Australia. There were two subspecies: B. p. ogilbyi in the west, and the now-extinct B. p. penicillata in the southeast.

<span class="mw-page-title-main">Desert rat-kangaroo</span> Extinct species of marsupial

The desert rat-kangaroo, also called the buff-nosed rat-kangaroo, plains rat-kangaroo or oolacunta, is an extinct small hopping marsupial endemic to desert regions of Central Australia. It was first recorded in the early 1840s and described by John Gould in London in 1843, on the basis of three specimens sent to him by George Grey, the governor of South Australia at the time.

<span class="mw-page-title-main">Eastern bettong</span> Species of marsupial

The eastern bettong, also known as the southern or Tasmanian bettong, is a small, hopping, rat-like mammal native to grassy forests of southeastern Australia and Tasmania. A member of the rat-kangaroo family (Potoroidae), it is active at night and feeds on fungi and plant roots. Like most marsupials, it carries its young in a pouch. The eastern bettong is under pressure by introduced predators and habitat loss. The subspecies on mainland Australia is extinct, but populations of the Tasmanian subspecies have been reintroduced there.

<span class="mw-page-title-main">Musky rat-kangaroo</span> Species of marsupial

The musky rat-kangaroo is a small marsupial found only in the rainforests of northeastern Australia. First described in the later 19th century, the only other species are known from fossil specimens. They are similar in appearance to potoroos and bettongs, but are not as closely related. Their omnivorous diet is known to include materials such as fruit and fungi, as well as small animals such as insects and other invertebrates.

<span class="mw-page-title-main">Long-nosed potoroo</span> Species of marsupial

The long-nosed potoroo is a small, hopping mammal native to forests and shrubland of southeastern Australia and Tasmania. A member of the potoroo and bettong family (Potoroidae), it lives alone and digs at night for fungi, roots, or small insects. It is also a marsupial and carries its young in a pouch. The long-nosed potoroo is threatened by habitat loss and introduced species such as cats or foxes. There are two subspecies: P. t. tridactylus on mainland Australia, and P. t. apicalis on Tasmania, with lighter fur.

<span class="mw-page-title-main">Gilbert's potoroo</span> Species of marsupial

Gilbert's potoroo or ngilkat is Australia's most endangered marsupial, the rarest marsupial in the world, and one of the world's rarest critically endangered mammals, found in south-western Western Australia. It is a small nocturnal macropod that lives in small groups.

<span class="mw-page-title-main">Northern bettong</span> Species of marsupial

The northern bettong is a small, endangered, gerbil-like mammal native to forests in northeast Australia. A member of the rat-kangaroo family (Potoroidae), it moves by hopping and lives in burrows, feeding at night on roots and fungi. It is also a marsupial and carries its young in a pouch. The northern bettong is threatened by habitat loss, and is now restricted to a few small areas.

<span class="mw-page-title-main">Potoroo</span> Genus of marsupials

Potoroo is a common name for species of Potorous, a genus of smaller marsupials. They are allied to the Macropodiformes, the suborder of kangaroo, wallaby, and other rat-kangaroo genera. All three extant species are threatened by ecological changes since the colonisation of Australia, especially the long-footed potoroo Potorous longipes (endangered) and P. gilbertii. The broad-faced potoroo P. platyops disappeared after its first description in the 19th century. The main threats are predation by introduced species and habitat loss.

<span class="mw-page-title-main">Macropodiformes</span> Suborder of marsupials

The Macropodiformes, also known as macropods, are one of the three suborders of the large marsupial order Diprotodontia. They may in fact be nested within one of the suborders, Phalangeriformes. Kangaroos, wallabies and allies, bettongs, potoroos and rat kangaroos are all members of this suborder.

<span class="mw-page-title-main">Boodie</span> Species of marsupial

The boodie, also known as the burrowing bettong or Lesueur's rat-kangaroo, is a small, furry, rat-like mammal native to Australia. Once common throughout the continent, it is now restricted to a few coastal islands. A member of the rat-kangaroo family (Potoroidae), it lives in burrows and is active at night when it forages for fungi, roots, and other plant matter. It is about the size of a rabbit and, like most marsupials, carries its young in a pouch.

<span class="mw-page-title-main">Bettong</span> Genus of marsupials

Bettongs, species of the genus Bettongia, are potoroine marsupials once common in Australia. They are important ecosystem engineers displaced during the colonisation of the continent, and are vulnerable to threatening factors such as altered fire regimes, land clearing, pastoralism and introduced predatory species such as the fox and cat.

Bulungamayinae is an extinct subfamily that allies fossil species of marsupials, showing close morphological features found in the modern potoroines, the bettongs and potoroos of Australia.

References

  1. Groves, C. P. (2005). "Order Diprotodontia". In Wilson, D. E.; Reeder, D. M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 57. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. 1 2 Burnett, S.; Winter, J. (2016). "Aepyprymnus rufescens". IUCN Red List of Threatened Species . 2016: e.T40558A21961456. doi: 10.2305/IUCN.UK.2016-2.RLTS.T40558A21961456.en . Retrieved 11 November 2021.
  3. Garrod, A.H. "On the kangaroo called Halmaturus luctuosus by D'Albertis and its affinities". Proceedings of the Zoological Society of London. 1875: 48–59.
  4. Gray, J.E. (1837). "Description of some new or little known Mammalia, principally in the British Museum Collection". Magazine of Natural History. n.s. 1: 577–587.
  5. 1 2 3 Strahan, R. (1995). The Mammals of Australia: the National Photographic Index of Australian Wildlife. Reed Books. p. 758.
  6. 1 2 Menkhorst, Peter (2001). A Field Guide to the Mammals of Australia. Oxford University Press. p. 100.
  7. 1 2 3 4 5 6 Menkhorst, P.W.; Knight, F. (2011). A field guide to the mammals of Australia (3rd ed.). Melbourne: Oxford University Press. p. 104. ISBN   9780195573954.
  8. Short, J.; Calaby, J. (July 2001). "The status of Australian mammals in 1922 - collections and field notes of museum collector Charles Hoy". Australian Zoologist. 31 (4): 533–562. doi: 10.7882/az.2001.002 . ISSN   0067-2238.