Swamp wallaby

Last updated

Swamp wallaby
Wallabia bicolor Jenolan Caves portrait.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Macropodidae
Subfamily: Macropodinae
Genus: Wallabia
Trouessart, 1905 [2]
Species:
W. bicolor
Binomial name
Wallabia bicolor
(Desmarest, 1804)
Swamp Wallaby IUCN Range.png
Swamp wallaby range
Synonyms
List
  • Kangurus bicolor Desmarest, 1804
  • Kangurus ualabatusLesson & Garnot, 1826
  • Halmaturus lessoniiGray, 1837
  • Halmaturus nemoralisWagner, 1842
  • Macropus ualabatus Thomas & Dollman, 1909

The swamp wallaby (Wallabia bicolor) is a small macropod marsupial of eastern Australia. [3] This wallaby is also commonly known as the black wallaby, with other names including black-tailed wallaby, fern wallaby, black pademelon , stinker (in Queensland), and black stinker (in New South Wales) on account of its characteristic swampy odour.

Contents

The swamp wallaby is the only living member of the genus Wallabia. [4]

Etymology

Historic names for the swamp wallaby include Aroe kangaroo. The swamp wallaby is known as banggarai in the Dharawal language. [5]

Habitat and distribution

The swamp wallaby is found from the northernmost areas of Cape York Peninsula in Queensland, down the entire east coast and around to western Victoria and south-eastern South Australia, where it has greatly expanded its distribution over the past four decades. Advances in rabbit control appear to have resulted in extension of the swamp wallaby's distribution, which has expanded since the time of European settlement. [6]

It inhabits thick undergrowth in forests and woodlands, or shelters during the day in thick grass or ferns, emerging at night to feed. They have been found to inhabit diverse habitats such as open farmland, mallee woodland, and sand-hills. [7] Brigalow scrub in Queensland is a particularly favoured habitat. [4]

Note the light cheek stripe Wallabia bicolor Jenolan Caves portrait.jpg
Note the light cheek stripe
A "pinky" stage pouch joey Swamp wallaby joey.jpg
A "pinky" stage pouch joey
A "young at foot" joey Swamp-Wallaby-joey-Wallabia-bicolor-cropped.jpg
A "young at foot" joey

Description

The species name bicolor comes from the distinct colouring variation, with the typical grey coat of the macropods varied with a dark brown to black region on the back, and light yellow to rufous orange on the chest. A light coloured cheek stripe is usually present, and extremities of the body generally show a darker colouring, except for the tip of the tail, which is often white. [3]

The swamp wallaby also has a rare 'golden' morph, found on the North and South Stradbroke islands and adjacent mainland. It is a yellow color with a white muzzle. The nose and paws could be pink or black. [8]

The gait differs from other wallabies, with the swamp wallaby carrying its head low and its tail out straight. [4]

The average length is 76 cm (30 in) for males, and 70 cm (28 in) for females (excluding the tail). The tail in both sexes is approximately equal in length to the rest of the body. Average weight for males is 17 kg (37 lb), females averaging 13 kg (29 lb). [4]

The swamp wallaby has seven carpal bones in the wrist (humans have eight). [9]

Reproduction

The swamp wallaby becomes reproductively fertile between 15 and 18 months of age, and can breed throughout the year. Gestation is from 33 to 38 days, leading to a single young. The young is carried in the pouch for 8 to 9 months, but will continue to suckle until about 15 months.

The swamp wallaby exhibits an unusual form of embryonic diapause, differing from other marsupials in having its gestation period longer than its oestrous cycle. [4] This timing makes it possible for swamp wallaby females to overlap two pregnancies, gestating both an embryo and a fetus at the same time. The swamp wallaby ovulates, mates, conceives and forms a new embryo one to two days before the birth of their full-term fetus. Consequently, females are continuously pregnant throughout their reproductive life. [10]

The swamp wallaby is notable for having a distinct sex-chromosome system from most other Theria (the subclass that includes marsupials and placental mammals). Females are characterized by the XX pair typical of therians, but males have one X chromosome and two non-sequence homology Y chromosomes. This system is thought to arise from a series of chromosomal fusions over the last 6 million years. [11]

A swamp wallaby feeding on leaves Image-Swamp-Wallaby-Feeding-4,-Vic,-Jan.2008.jpg
A swamp wallaby feeding on leaves

Nutrition

The swamp wallaby is typically a solitary animal, but often aggregates into groups when feeding. [3] It will eat a wide range of food plants, depending on availability, including shrubs, pasture, agricultural crops, and native and exotic vegetation. It appears to be able to tolerate a variety of plants poisonous to many other animals, including brackens, hemlock and lantana. [4]

The ideal diet appears to involve browsing on shrubs and bushes, rather than grazing on grasses. This is unusual in wallabies and other macropods, which typically prefer grazing. Tooth structure reflects this preference for browsing, with the shape of the molars differing from other wallabies. The fourth premolar is retained through life, and is shaped for cutting through coarse plant material. [4]

There is evidence that the swamp wallaby is an opportunist taking advantage of food sources when they become available, such as fungi, bark and algae. There is also one reported case of the consumption of carrion. [12]

Taxonomy

Several physical and behavioral characteristics make the swamp wallaby different enough from other wallabies that it is placed apart in its own genus, Wallabia. [13] [3] However, genetic evidence demonstrates that Wallabia is embedded within the large genus Macropus, necessitating reclassification of this species in the future. [14]

Threats

Anthropogenic actions, such as the increase in roads through swamp wallaby habitats, are a threat to their survival. They are frequently seen near the side of roads, leading to a larger number becoming roadkill. [15]

Other sources of threat for the swamp wallaby are their predators, which include dingoes, eagles and wild dogs. [16]

Related Research Articles

<span class="mw-page-title-main">Kangaroo</span> Marsupial of the family Macropodidae

Kangaroos are marsupials from the family Macropodidae. In common use the term is used to describe the largest species from this family, the red kangaroo, as well as the antilopine kangaroo, eastern grey kangaroo, and western grey kangaroo. Kangaroos are indigenous to Australia and New Guinea. The Australian government estimates that 42.8 million kangaroos lived within the commercial harvest areas of Australia in 2019, down from 53.2 million in 2013.

<span class="mw-page-title-main">Marsupial</span> Infraclass of mammals in the clade Metatheria

Marsupials are a diverse group of mammals belonging to the infraclass Marsupialia. They are natively found in Australasia, Wallacea, and the Americas. One of the defining features of marsupials is their unique reproductive strategy, where the young are born in a relatively undeveloped state and then nurtured within a pouch on their mother's abdomen.

<span class="mw-page-title-main">Wallaby</span> Macropods of Australia and New Guinea

A wallaby is a small or middle-sized macropod native to Australia and New Guinea, with introduced populations in New Zealand, Hawaii, the United Kingdom and other countries. They belong to the same taxonomic family as kangaroos and sometimes the same genus, but kangaroos are specifically categorised into the four largest species of the family. The term "wallaby" is an informal designation generally used for any macropod that is smaller than a kangaroo or a wallaroo that has not been designated otherwise.

Taunton National Park is situated near the town of Dingo approximately 135 km inland from Rockhampton in eastern Central Queensland, Australia. The park encompasses an area of 11,626 ha within the Northern Brigalow Belt bioregion of Queensland; a region widely recognised to contain considerable biodiversity.

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

Tree-kangaroos are marsupials of the genus Dendrolagus, adapted for arboreal locomotion. They inhabit the tropical rainforests of New Guinea and far northeastern Queensland, Australia along with some of the islands in the region. All tree-kangaroos are considered threatened due to hunting and habitat destruction. They are the only true arboreal macropods.

<span class="mw-page-title-main">Macropodidae</span> Family of marsupial mammals

Macropodidae is a family of marsupials that includes kangaroos, wallabies, tree-kangaroos, wallaroos, pademelons, quokkas, and several other groups. These genera are allied to the suborder Macropodiformes, containing other macropods, and are native to the Australian continent, New Guinea and nearby islands.

<span class="mw-page-title-main">Tammar wallaby</span> A small macropod native to South and Western Australia

The tammar wallaby, also known as the dama wallaby or darma wallaby, is a small macropod native to South and Western Australia. Though its geographical range has been severely reduced since European colonisation, the tammar wallaby remains common within its reduced range and is listed as "Least Concern" by the International Union for Conservation of Nature (IUCN). It has been introduced to New Zealand and reintroduced to some areas of Australia where it had been previously extirpated. Skull variations differentiate between tammar wallabies from Western Australia, Kangaroo Island, and mainland South Australia, making them distinct population groups.

<span class="mw-page-title-main">Pademelon</span> Small terrestrial marsupial

Pademelons are small marsupials in the genus Thylogale, found in Australia and Aru, Kai plus New Guinea islands. They are some of the smallest members of the macropod family, which includes the similar-looking but larger kangaroos and wallabies. Pademelons are distinguished by their small size and their short, thick, and sparsely-haired tails. Like most other marsupials, they carry their young in a pouch.

<span class="mw-page-title-main">Banded hare-wallaby</span> Species of marsupial

The banded hare-wallaby, mernine, or munning is a marsupial currently found on the islands of Bernier and Dorre off western Australia. Reintroduced populations have recently been established on islands and fenced mainland sites, including Faure Island and Wadderin Sanctuary near Narembeen in the central wheatbelt.

<span class="mw-page-title-main">Bridled nail-tail wallaby</span> Species of marsupial

The bridled nail-tail wallaby, also known as the bridled nail-tailed wallaby, bridled nailtail wallaby, bridled wallaby, merrin, and flashjack, is a vulnerable species of macropod. It is a small wallaby found in three isolated areas in Queensland, Australia, and whose population is declining. In early 2019 the total population of the species was estimated to be fewer than 500 mature individuals in the wild and 2285 in captivity.

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

The kultarr is a small insectivorous nocturnal marsupial inhabiting the arid interior of Australia. Preferred habitat includes stony deserts, shrubland, woodland, grassland and open plains. The kultarr has a range of adaptations to help cope with Australia's harsh arid environment including torpor similar to hibernation that helps conserve energy. The species has declined across its former range since European settlement due to changes in land management practices and introduced predators.

<span class="mw-page-title-main">Yellow-footed rock-wallaby</span> Species of marsupial

The yellow-footed rock-wallaby, formerly known as the ring-tailed rock-wallaby, is a member of the macropod family.

<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">Whiptail wallaby</span> Species of marsupial

The whiptail wallaby, also known as the pretty-faced wallaby, is a species of wallaby found in eastern Australia. It is locally common from Cooktown in Queensland to near Grafton in New South Wales.

<span class="mw-page-title-main">Western brush wallaby</span> Species of marsupial

The western brush wallaby, also known as the black-gloved wallaby, is a species of wallaby found in the southwestern coastal region of Western Australia. The wallaby's main threat is predation by the introduced red fox. The IUCN lists the western brush wallaby as Least Concern, as it remains fairly widespread and the population is believed to be stable or increasing, as a result of red fox control programs.

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

The northern or sandy nail-tail wallaby is a species of macropod found across northern Australia on arid and sparsely wooded plains. The largest species of the genus Onychogalea, it is a solitary and nocturnal herbivorous browser that selects its food from a wide variety of grasses and succulent plant material. Distinguished by a slender and long-limbed form that resembles the typical and well known kangaroos, although their standing height is shorter, around half of one metre, and their weight is less than nine kilograms. As with some medium to large kangaroo species, such as Osphranter rufus, they have an unusual pentapedal motion at slow speeds by stiffening the tail for a fifth limb. When fleeing a disturbance, they hop rapidly with the tail curled back and repeatedly utter the sound "wuluhwuluh". Their exceptionally long tail has a broad fingernail-like protuberance beneath a dark crest of hair at its end, a peculiarity of the genus that is much broader than the other species. The name unguifera, meaning claw, is a reference to this extraordinary attribute, the purpose of which is unknown.

<span class="mw-page-title-main">Macropod hybrid</span> List of hybrid marsupials

Macropod hybrids are hybrids of animals within the family Macropodidae, which includes kangaroos and wallabies. Several macropod hybrids have been experimentally bred, including:

<span class="mw-page-title-main">Crest-tailed mulgara</span> Species of marsupial

The crest-tailed mulgara is a small to medium-sized Australian carnivorous marsupial and a member of the family Dasyuridae which includes quolls, dunnarts, numbats, the endangered Tasmanian devil and the extinct thylacine. The crest-tailed mulgara is among a group of native predatory mammals or mesopredators endemic to arid Australia.

References

  1. Menkhorst, P.; Denny, M.; Ellis, M.; Winter, J.; Burnett, S.; Lunney, D.; van Weenen, J. (2016). "Wallabia bicolor". IUCN Red List of Threatened Species . 2016: e.T40575A21952658. doi: 10.2305/IUCN.UK.2016-2.RLTS.T40575A21952658.en . Retrieved 12 November 2021.
  2. Trouessart, E.-L. (1904). Catalogus mammalium tam viventium quam fossilium. Vol. Quinquennale supplementum. Berolini: R. Friedländer & Sohn. p. 834.
  3. 1 2 3 4 Merchant, J. C. (1995). Strahan, Ronald (ed.). Mammals of Australia (Revised ed.). Sydney: Reed New Holland Publishers. p. 409.
  4. 1 2 3 4 5 6 7 Merchant, J. C. (1983). Strahan, Ronald (ed.). The Australian Museum Complete Book of Australian Mammals, The National Photographic Index of Australian Wildlife (Corrected 1991 reprint ed.). Australia: Cornstalk Publishing. pp. 261–262. ISBN   0-207-14454-0.
  5. "Dharug and Dharawal Resources".
  6. Cooke, B. D. (2020). "Swamp wallaby (Wallabia bicolor) distribution has dramatically increased following sustained biological control of rabbits". Australian Mammalogy. 42 (3): 321. doi:10.1071/AM19037 . Retrieved 31 October 2024.
  7. Cooke, B. D. (2020). "Swamp wallaby (Wallabia bicolor) distribution has dramatically increased following sustained biological control of rabbits". Australian Mammalogy. 42 (3): 321. doi:10.1071/AM19037 . Retrieved 31 October 2024.
  8. Teideman, Jess (2019-01-06). "Golden swamp wallaby". Australian Geographic. Retrieved 2024-11-26.
  9. "Carpals of Swamp Wallaby – Wallabia bicolor". 3 July 2014.
  10. "Swamp wallabies conceive new embryo before birth -- a unique reproductive strategy". ScienceDaily. Retrieved 2020-03-03.
  11. Toder, R; O'Neill, R J; Wienberg, K; O'Brien, P C; Voullaire, L; Marshall-Graves, J A (June 1997). "Comparative chromosome painting between two marsupials: origins of an XX/XY1Y2 sex chromosome system". Mamm Genome. 8 (6): 418–22. doi:10.1007/s003359900459. PMID   9166586. S2CID   12515691 . Retrieved March 1, 2022.
  12. Fitzsimons, James A. (2016). "Carrion consumption by the swamp wallaby (Wallabia bicolor)". Australian Mammalogy. 39: 105. doi:10.1071/AM16017.
  13. Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. p. 70. ISBN   0-801-88221-4. OCLC   62265494.
  14. Dodt, William G.; Gallus, Susanne; Phillips, Matthew J.; Nilsson, Maria A. (1 December 2017). "Resolving kangaroo phylogeny and overcoming retrotransposon ascertainment bias". Scientific Reports. 7 (1). doi:10.1038/s41598-017-16148-0. PMC   5711953 . Retrieved 31 October 2024.
  15. Osawa, R (1989). "Road-Kills of the Swamp Wallaby, Wallabia-Bicolor, on North-Stradbroke-Island, Southeast Queensland". Wildlife Research. 16 (1): 95. doi:10.1071/WR9890095. ISSN   1035-3712.
  16. Davis, Naomi E.; Forsyth, David M.; Triggs, Barbara; Pascoe, Charlie; Benshemesh, Joe; Robley, Alan; Lawrence, Jenny; Ritchie, Euan G.; Nimmo, Dale G.; Lumsden, Lindy F. (2015-03-19). Crowther, Mathew S. (ed.). "Interspecific and Geographic Variation in the Diets of Sympatric Carnivores: Dingoes/Wild Dogs and Red Foxes in South-Eastern Australia". PLOS ONE. 10 (3): e0120975. Bibcode:2015PLoSO..1020975D. doi: 10.1371/journal.pone.0120975 . ISSN   1932-6203. PMC   4366095 . PMID   25790230.