Western grey kangaroo

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Western grey kangaroo [1]
Kangaroo Island Western grey kangaroo (Macropus fuliginosus fuliginosus) male.jpg
Male
Kangaroo Island Western grey kangaroo (Macropus fuliginosus fuliginosus) female with joey 2.jpg
Female with joey
Status ESA DL.svg
Delisted (ESA) [3]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Diprotodontia
Family: Macropodidae
Genus: Macropus
Species:
M. fuliginosus
Binomial name
Macropus fuliginosus
Desmarest, 1817
Western Grey Kangaroo Range.jpg
Western grey kangaroo range

The western grey kangaroo (Macropus fuliginosus), also referred to as a western grey giant kangaroo, black-faced kangaroo, mallee kangaroo, sooty kangaroo and (when referring to the Kangaroo Island subspecies) Kangaroo Island grey kangaroo, [4] is a large and very common kangaroo found across almost the entire southern part of Australia, from just south of Shark Bay through coastal Western Australia and South Australia, into western Victoria, and in the entire Murray–Darling basin in New South Wales and Queensland.

Contents

Taxonomy

Long known to the Aboriginal Australians, for Europeans, the western grey kangaroo was the centre of a great deal of sometimes comical taxonomic confusion for almost 200 years. It was first noted by European explorers when Matthew Flinders landed on Kangaroo Island in 1802. [5] Flinders shot several for food, but assumed that they were eastern grey kangaroos. In 1803, French explorers captured several Kangaroo Island western grey kangaroos and shipped them to Paris, where they lived in the Ménagerie du Jardin des Plantes for some years. Eventually, researchers at the Paris Museum of Natural History recognized that these animals were indeed distinct from the eastern grey kangaroo and formally described the species as Macropus fuliginosus in 1817. For reasons that remain unclear, the species was, later in 1888, incorrectly described as native to Tasmania. [6] It was not until 1924 that researchers realized that the "forester kangaroo" of Tasmania was in fact Macropus giganteus, the same eastern grey kangaroo that was, and still is, widespread in the southeastern part of the mainland, and reaffirmed Kangaroo Island as the source of the type specimens. [5] [6] By 1971, it was understood that the Kangaroo Island western grey kangaroo belonged to the same species as the kangaroos of southern and Western Australia, and that this population extended through much of the eastern part of the continent as well (see range map). For a time, three subspecies were described, two on the mainland and one on Kangaroo Island. The current classification scheme emerged in the 1990s.[ citation needed ]

The western grey kangaroo is not found in the north or the far southeast of Australia, and the eastern grey does not extend beyond the New South Wales–South Australia border, but the two species are both common in the Murray–Darling basin area. They never interbreed in the wild, although it has proved possible to produce hybrids between eastern grey females and western grey males in captivity.

Subspecies

There are two subspecies:

Description

The western grey kangaroo is one of the largest macropods in Australia. It weighs 28–54 kg (62–120 lb) and its length is 0.84–1.1 m (2 ft 9 in – 3 ft 7 in) with a 0.80–1.0 m (2 ft 7 in – 3 ft 3 in) tail, standing approximately 1.3 m (4 ft 3 in) tall. [7] It exhibits sexual dimorphism with the male up to twice the size of female. It has thick, coarse fur with colour ranging from pale grey to brown; its throat, chest and belly have a paler colour. [8]

This species is difficult to distinguish from its sibling species, the eastern grey kangaroo (Macropus giganteus). However, the western grey kangaroo has darker grey-brown fur, darker colouration around the head, and sometimes has a blackish patch around the elbow. [9]

Ecology and behaviour

A mother with a joey photographed at the Donnelly Mills in Western Australia Grey Roo with Joey SMC 2006.jpg
A mother with a joey photographed at the Donnelly Mills in Western Australia

Diet

It feeds at night, mainly on grasses and forbs but also on leafy shrubs and low trees. [10] It has a nickname "stinker" because mature males have a distinctive curry-like odour. [11]

Thermoregulation

The western grey kangaroo is a nocturnal species that varies its core body temperature based on daily ambient temperatures. The kangaroo's lowest daily core body temperature occurs mid-morning. In the summer, this was 2.2 °C (4 °F) lower than during cooler spring days. [12] This reduced summer body temperature is thought to allow the species to conserve energy during a time when food availability is low.

Reproduction and development

A female suckling her joey at the Darling range in Western Australia Macropus Fuliginosus feeding.JPG
A female suckling her joey at the Darling range in Western Australia

The western grey kangaroo lives in groups of up to 15, and the males compete for females during the breeding season. [13] During these "boxing" contests, they lock arms and try to push each other over. Usually, only the dominant male in the group mates. [8] The gestation period is 30–31 days, after which the incompletely developed fetus (referred to as a joey ) attaches to the teat in the pouch for 130–150 days. [8] Females reach sexual maturity at 17 months while males mature at around 20 months. [13]

The western grey kangaroo is closely related to the eastern grey kangaroo (M. giganteus), and their distribution overlaps extensively, especially in the Murray–Darling basin. However, the two species interbreed only rarely in the wild. Although hybridisation occurs in both directions in the overlap zone between the two species, this does not seem to be the case with captive animals. Although interbreeding between the two species does occasionally occur in captive animals, viable offspring are only produced when the mating pair consists of a female eastern grey kangaroo and a male western grey kangaroo. This is an example of unidirectional hybridisation. [14]

Relationship with humans

The western grey kangaroo is classified as Least Concern by the IUCN Red List, with a population showing an increasing trend. [2] [15] Total population within the commercial harvest areas is estimated to be around 3,781,023 individuals in 2020. [16]

Though the feeding habits of M. fuliginosus can be problematic for agriculture, it is protected and controlled exclusively by the state faunal authorities. [13] Because it is considered a competitor for water and pasture by ranchers, this species is considered a pest in some areas. To limit agricultural damage, kangaroo culling has been allowed under license every year. [15]

Commercial hunting for meat and skin also allowed under regulation, with skins providing a high-quality, long-lasting leather. About 40% of harvested meat is used for human consumption; leather is used as a material for handbags, briefcases, and belts. [15]

Commercial hunting is permitted in New South Wales, mainland South Australia, and Western Australia, but prohibited in Tasmania, Northern Territory and Kangaroo Island. [15]

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">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">Eastern grey kangaroo</span> Species of kangaroo

The eastern grey kangaroo is a marsupial found in the eastern third of Australia, with a population of several million. It is also known as the great grey kangaroo and the forester kangaroo. Although a big eastern grey male can typically weigh up to 66 kg (146 lb) and have a length of well over 2 m, the scientific name, Macropus giganteus, is misleading: the red kangaroo of the semi-arid inland is larger, weighing up to 90 kg (200 lb).

<span class="mw-page-title-main">Red kangaroo</span> Species of mammal

The red kangaroo is the largest of all kangaroos, the largest terrestrial mammal native to Australia, and the largest extant marsupial. It is found across mainland Australia, except for the more fertile areas, such as southern Western Australia, the eastern and southeastern coasts, and the rainforests along the northern coast.

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

The red-necked wallaby or Bennett's wallaby is a medium-sized macropod marsupial (wallaby), common in the more temperate and fertile parts of eastern Australia, including Tasmania. Red-necked wallabies have been introduced to several other countries, including New Zealand, the United Kingdom, Ireland, the Isle of Man, France and Germany.

<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">Australian megafauna</span> Large animals in Australia, past and present era

The term Australian megafauna refers to the megafauna in Australia during the Pleistocene Epoch. Most of these species became extinct during the latter half of the Pleistocene, and the roles of human and climatic factors in their extinction are contested.

<span class="mw-page-title-main">Tasmanian pygmy possum</span> Species of marsupial

The Tasmanian pygmy possum, also known as the little pygmy possum or tiny pygmy possum, is the world's smallest possum. It was first described by Oldfield Thomas in 1888, after he identified that a museum specimen labelled as an eastern pygmy possum in fact represented a species then unknown to science. The holotype resides in the Natural History Museum in London.

<span class="mw-page-title-main">Swamp wallaby</span> Species of mammal

The swamp wallaby is a small macropod marsupial of eastern Australia. This wallaby is also commonly known as the black wallaby, with other names including black-tailed wallaby, fern wallaby, black pademelon, stinker, and black stinker on account of its characteristic swampy odour.

<span class="mw-page-title-main">Kangaroo meat</span>

Kangaroo meat is produced in Australia from wild kangaroos and is exported to over 61 overseas markets.

<i>Macropus</i> Genus of marsupials

Macropus is a marsupial genus in the family Macropodidae. It has two extant species of large terrestrial kangaroos. The term is derived from the Ancient Greek μάκρος, makros "long" and πους, pous "foot". Thirteen known extinct species are recognised. The type species is the eastern grey kangaroo.

Grey kangaroo is a kangaroo that is grey. Species include:

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

The agile wallaby, also known as the sandy wallaby, is a species of wallaby found in northern Australia and southern New Guinea. It is the most common wallaby in north Australia. The agile wallaby is a sandy colour, becoming paler below. It is sometimes solitary and at other times sociable and grazes on grasses and other plants. The agile wallaby is not considered threatened.

<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">Antilopine kangaroo</span> Species of marsupial

The antilopine kangaroo, also known as the antilopine wallaroo or the antilopine wallaby, is a species of macropod found in northern Australia: in Cape York Peninsula in Queensland, the Top End of the Northern Territory, and the Kimberley region of Western Australia. It is a locally common, gregarious grazer.

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

The black wallaroo, also known as Woodward's wallaroo, is a species of macropod restricted to a small, mountainous area in Arnhem Land, Northern Territory, Australia, between South Alligator River and Nabarlek. It classified as near threatened, mostly due to its limited distribution. A large proportion of the range is protected by Kakadu National Park.

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

The common wallaroo, also known as the euro, hill wallaroo, or simply wallaroo, is a species of macropod. The word euro is particularly applied to one subspecies.

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

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

Macropus pan is a species of marsupial that existed during the Pliocene in Australia, known only from fossils located at several sites across Australia. The species is recognised as allied to the modern grey kangaroos, the western Macropus fuliginosus and eastern Macropus giganteus, in a clade initially named as subgenus Macropus (Macropus) Dawson & Flannery. The first description was provided by Charles W. De Vis in 1895, emerging from the author's examination of fossil material held at the Queensland Museum. Fossil specimens of Quanbun local fauna, named for a site in Western Australia, were also identified as this species. The origin of the type specimen was not recorded, although based on comparisons to material with a known provenance it is assumed to have excavated at Chinchilla, Queensland. A larger macropod than any modern species, the standing height was estimated to be over two metres.

References

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  6. 1 2 Poole, WE (1976). "Breeding Biology and Current Status of the Grey Kangaroo, Macropus Fulginosus Fulginosus, of Kangaroo Island, South Australia". Australian Journal of Zoology. 24 (2): 169–187. doi:10.1071/zo9760169. ISSN   1446-5698 . Retrieved 2020-12-17.
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  10. "Macropus fuliginosus (Western gray kangaroo)". Animal Diversity Web .
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  12. Maloney, Shane K.; Fuller, Andrea; Meyer, Leith C. R.; Kamerman, Peter R.; Mitchell, Graham; Mitchell, Duncan (2011). "Minimum daily core body temperature in western grey kangaroos decreases as summer advances: a seasonal pattern, or a direct response to water, heat or energy supply?". Journal of Experimental Biology. 214 (11): 1813–1820. doi:10.1242/jeb.050500. PMID   21562167. S2CID   10638660 . Retrieved 2022-12-12.
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  14. Dawson, TJ (2012). "Types of kangaroo". Kangaroos (2nd ed.). Collingwood, Victoria, Australia: CSIRO Publishing. pp. 15–32. ISBN   978-0643106253.
  15. 1 2 3 4 "Western Gray Kangaroo (Macropus fuliginosus) Fact Sheet: Summary". San Diego Zoo Global Library. Retrieved 27 October 2019.
  16. "Macropod quotas and harvest for commercial harvest areas in NSW, QLD, SA and WA - 2020" (PDF). Department of Climate Change, Energy, the Environment and Water. Australian Government. Retrieved 5 December 2022.