Red-necked wallaby

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Red-necked wallaby[1] and
Bennett's wallaby
Macropus rufogriseus rufogriseus Bruny.jpg
Bennett's wallaby (M. r. rufogriseus), Bruny Island, Tasmania
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Macropodidae
Genus: Macropus
Species: M. rufogriseus
Binomial name
Macropus rufogriseus
(Desmarest, 1817)
Subspecies

M. r. rufogriseus, Bennett's wallaby
M. r. banksianus, Red-necked wallaby
M. r. fruticus

Bennett's Wallaby.jpg
Red-necked wallaby range

The red-necked wallaby (Macropus rufogriseus) is a medium-sized macropod marsupial (wallaby), common in the more temperate and fertile parts of eastern Australia, including Tasmania.

Description[edit]

Red-necked wallabies are distinguished by their black nose and paws, white stripe on the upper lip, and grizzled medium grey coat with a reddish wash across the shoulders. They can weigh 13.80 to 18.60 kilograms (30.4 to 41.0 lb) and attain a head-body length of 90 centimetres (35 in), although males are generally bigger than females. Red-necked wallabies are very similar in appearance to the Black-striped wallaby, the only difference being that Red-necked wallabies are larger, doesn't have a black stripe down their back, and their fur is softer.[3] Red-necked wallabies may live up to 9 years.[4]

Distribution and habitat[edit]

Joey in pouch
Two male adults fighting

Red-necked wallabies are found in coastal scrub and sclerophyll forest throughout coastal and highland eastern Australia, from Bundaberg, Queensland to the South Australian border;[4] in Tasmania and on many of the Bass Strait islands (although it is unclear which of the islands have native populations as opposed to introduced ones); as well as an introduced population in the Canterbury region of New Zealand's South Island. In Tasmania and coastal Queensland, their numbers have expanded over the past 30 years because of a reduction in hunting pressure and the partial clearing of forest to result in a mosaic of pastures where wallabies can feed at night, alongside bushland where they can shelter by day. For reasons not altogether clear, they are less common in Victoria.

Behaviour[edit]

Red-necked wallabies are mainly solitary but will gather together when there’s an abundance of resources such as food, water or shelter. When they do gather in groups, they have a social hierarchy similar to other wallaby species. A recent study has demonstrated that wallabies, as other social or gregarious mammals, are able to manage conflict via reconciliation, involving the post-conflict reunion, after a fight, of former opponents, which engage affinitive contacts.[5] Red-necked wallabies are mainly nocturnal. They spend most of the daytime resting.[4]

A female’s estrous lasts 33 days.[4] During courting, the female first licks the male’s neck. The male will then rub his cheek against the female’s. Then the male and female will fight briefly, standing upright like two males. After that they finally mate. A couple will stay together for one day before separating. A female bears one offspring at a time; young stay in the pouch for about 280 days,[6] after which females and their offspring stay together for only a month. However, females may stay in the home range of their mothers for life while males leave at two years old. Also, red-necked wallabies engage in alloparental care, in which a wallaby may adopt the child of another wallaby. This is a common behavior seen in many other animal species like wolves, elephants, and fathead minnows.[7]

Diet[edit]

Red-necked wallabies diets consists of grasses, roots, tree leaves, and weeds.[4]

Subspecies[edit]

There are three subspecies.

  • M. r. banksianus (Quoy & Gaimard, 1825) – Red-necked wallaby
  • M. r. rufogriseus (Desmarest, 1817) – Bennett's wallaby
  • M. r. fruticus (Ogilby, 1838)

The Tasmanian form, Macropus rufogriseus rufogriseus, usually known as Bennett's wallaby is smaller (as island species often are), has longer, darker,[3] shaggier fur, and breeds in the late summer, mostly between February and April. They have adapted to living in proximity to humans and can be found grazing on lawns in the fringes of Hobart and other urban areas.

Juvenile Macropus rufogriseus rufogriseus

The mainland form, Macropus rufogriseus banksianus, breeds all year round. Interestingly, captive animals maintain their breeding schedules; Tasmanian females that become pregnant out of their normal season delaying birth until summer, which can be anything up to eight months later.

Introduction to other countries[edit]

A population of albino Bennett's wallabies live on Bruny Island

There is a small colony of red-necked wallabies on the island of Inchconnachan, Loch Lomond in Argyll and Bute, Scotland. This was founded in 1975 with two pairs taken from Whipsnade Zoo, and had risen to 26 individuals by 1993.[8] There is also a group of wallabies living wild on the Isle of Man who are the descendants of a pair that escaped from a wildlife park on the island in the 1970s.[9]

There are also colonies in England:[4] in the Peak District, in Derbyshire, and in the Ashdown Forest, in East Sussex. These were established c.1900. There are also other smaller groups frequently spotted in West Sussex and Hampshire.

In France, in the southern part of the Forest of Rambouillet, 50 km (31 mi) west from Paris, there is a wild group of around 30 Bennett's Wallabies. This population has been present since the seventies, when some individuals escaped from the zoological park of Émancé after a storm.[10]

In 1870, several wallabies were transported from Tasmania to Christchurch, New Zealand. Two females and one male from this stock were later released about Te Waimate, the property of Waimate's first European settler. The year 1874 saw them freed in the Hunters Hills, where over the years their population has dramatically increased. Wallabies are now resident on approximately 350,000 ha of terrain centered upon the Hunters Hills, including the Two Thumb Ranges, the Kirkliston Range and The Grampians. They are declared an animal pest in the Canterbury Region and land occupiers must contain the wallabies within specified areas.[11]

References[edit]

  1. ^ Groves, C. P. (2005). "Order Diprotodontia". In Wilson, D. E.; Reeder, D. M. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. p. 65. ISBN 978-0-8018-8221-0. OCLC 62265494. 
  2. ^ McKenzie, N., Menkhorst, P. & Lunney, D. (2008). Macropus rufogriseus. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 28 December 2008. Database entry includes justification for why this species is of least concern
  3. ^ a b Staker, Lynda (2006). The Complete Guide to the Care of Macropods. Lynda Staker. p. 54. ISBN 0977575101. 
  4. ^ a b c d e f Long, John (2003). Introduced Mammals of the World. Csiro Publishing. p. 40. ISBN 0643099166. 
  5. ^ Cordoni, G., Norscia, I., 2014: Peace-Making in Marsupials: The First Study in the Red-Necked Wallaby (Macropus rufogriseus) PLoS ONE 9(1): e86859. doi:10.1371/journal.pone.0086859
  6. ^ http://www.eol.org/pages/133321
  7. ^ Riedman, Marianne L. (December 1982). “The Evolution of Alloparental Care in Mammals and Birds”. The Quarterly Review of Biology 57 (4): 405-435
  8. ^ "The Colquhoun's Island". Inchconnachan Island - Loch Lomond. Retrieved 17 October 2010. 
  9. ^ Normand, Jacey (17 October 2010). "Searching for the Isle of Man's wild wallabies". BBC News. Retrieved 17 October 2010. 
  10. ^ http://www.cerf78.fr/index.php?option=com_content&task=view&id=215&Itemid=307
  11. ^ "Rules for animal pests". Ecan. 30 March 2010. Retrieved 16 August 2010.