HOME

TheInfoList



OR:

The western quoll (''Dasyurus geoffroii'') is Western Australia's largest
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
mammalian
carnivore A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, fat and other sof ...
. One of the many
marsupial Marsupials are any members of the mammalian infraclass Marsupialia. All extant marsupials are endemic to Australasia, Wallacea and the Americas. A distinctive characteristic common to most of these species is that the young are carried in a po ...
mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...
s native to
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
, it is also known as the chuditch. The species is currently classed as
near-threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...
.


Taxonomy

The western quoll is a member of the family
Dasyuridae The Dasyuridae are a family of marsupials native to Australia and New Guinea, including 71 extant species divided into 17 genera. Many are small and mouse-like or shrew-like, giving some of them the name marsupial mice or marsupial shrews, but th ...
and is most closely related to the
bronze quoll The bronze quoll (''Dasyurus spartacus'') is a species of quoll found only in the Trans-Fly savanna and grasslands of New Guinea and West Papua. History It was discovered in the early 1970s when five specimens were collected, but only described ...
(''Dasyurus spartacus''), a recently described species from
New Guinea New Guinea (; Hiri Motu Hiri Motu, also known as Police Motu, Pidgin Motu, or just Hiri, is a language of Papua New Guinea, which is spoken in surrounding areas of Port Moresby (Capital of Papua New Guinea). It is a simplified version of ...
that was for some time believed to be an outlying population of the western quoll. Its species name, ''geoffroii'', refers to the prominent French naturalist
Étienne Geoffroy Saint-Hilaire Étienne Geoffroy Saint-Hilaire (15 April 177219 June 1844) was a French naturalist who established the principle of "unity of composition". He was a colleague of Jean-Baptiste Lamarck and expanded and defended Lamarck's evolutionary theories. ...
, who named the genus ''
Dasyurus Quolls (; genus ''Dasyurus'') are carnivorous marsupials native to Australia and New Guinea. They are primarily nocturnal and spend most of the day in a den. Of the six species of quoll, four are found in Australia and two in New Guinea. Anoth ...
'' in 1796. The species has occasionally been placed in the genus ''Dasyurinus''. It is also known as the chuditch () in Western Australia (from
Noongar The Noongar (, also spelt Noongah, Nyungar , Nyoongar, Nyoongah, Nyungah, Nyugah, and Yunga ) are Aboriginal Australian peoples who live in the south-west corner of Western Australia, from Geraldton on the west coast to Esperance on the so ...
''djooditj''); ''chuditch'' serves as both the singular and plural form. Other
common name In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contrast ...
s include ''atyelpe'' or ''chilpa'' (from
Arrernte Arrernte (also spelt Aranda, etc.) is a descriptor related to a group of Aboriginal Australian peoples from Central Australia. It may refer to: * Arrernte (area), land controlled by the Arrernte Council (?) * Arrernte people, Aboriginal Australi ...
), ''kuninka'' (from Western Desert language); ''idnya'' (
Adnyamathanha The Adnyamathanha (Pronounced: ) are a contemporary Aboriginal Australian people of the northern Flinders Ranges, South Australia, formed as an aggregate of several distinct peoples. Strictly speaking the ethnonym Adnyamathanha was an alternativ ...
people of the Flinders Ranges) and the archaic western native cat.


Description

The western quoll is about the size of a domestic cat. It is coloured a
rufous Rufous () is a color that may be described as reddish-brown or brownish-red, as of rust or oxidised iron. The first recorded use of ''rufous'' as a color name in English was in 1782. However, the color is also recorded earlier in 1527 as a dia ...
brown and has 40–70 white spots on its back with a creamy white underside. Its spots actually help diminish its outline from the moon at night when hunting. It has five toes on its hind feet and
granular Granularity (also called graininess), the condition of existing in granules or grains, refers to the extent to which a material or system is composed of distinguishable pieces. It can either refer to the extent to which a larger entity is subd ...
pads. The head and body are about 36 cm to 46 cm in length, and the tail is around 22 cm to 30 cm. With large eyes and pointed ears, it is well adapted for nocturnal life. The black brush on its tail extends from halfway down to the tip. Males typically weigh around 1.3 kg, and females 0.9 kg. The longest they are likely to live is four years. Often confused with
eastern quoll The eastern quoll (''Dasyurus viverrinus'', formerly known as the eastern native cat) is a medium-sized carnivorous marsupial (dasyurid), and one of six extant species of quolls. Endemic to Australia, they occur on the island state of Tasmania, ...
, it differs in possessing a first toe on the hind foot and a darker tail. It does share a white-spotted brown coat and a long tail with both the
eastern quoll The eastern quoll (''Dasyurus viverrinus'', formerly known as the eastern native cat) is a medium-sized carnivorous marsupial (dasyurid), and one of six extant species of quolls. Endemic to Australia, they occur on the island state of Tasmania, ...
and
northern quoll The northern quoll (''Dasyurus hallucatus''), also known as the northern native cat, the North Australian native cat or the satanellus is a carnivorous marsupial native to Australia. Taxonomy The northern quoll is a member of the family Das ...
.


Habitat

Once found across 70% of the Australian continent, the western quoll is now confined to south-western corner of
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
. This perhaps was due to European settlement in the late 1780s as their range dramatically declined after this event. It currently inhabits wet and dry
sclerophyll Sclerophyll is a type of vegetation that is adapted to long periods of dryness and heat. The plants feature hard leaf, leaves, short Internode (botany), internodes (the distance between leaves along the stem) and leaf orientation which is paral ...
forests, including contiguous
Jarrah Forest Jarrah forest is tall open forest in which the dominant overstory tree is ''Eucalyptus marginata'' (jarrah). The ecosystem occurs only in the Southwest Botanical Province of Western Australia. It is most common in the biogeographic region named in ...
and mallee. These areas consist of open forest, low open forest, woodland, and open shrub. On occasion they are recorded in the WA Wheatbelt and Goldfields regions, and by the 1930s disappeared completely from Swan Coastal Plain and surrounds. As a result of its carnivorous feeding habits, the western quoll has a large home range. These territories often share rock ledges and other open spaces. This serves to mark territory and for other social functions. Males spread out over about 15 square kilometres and typically overlap with several female ranges, about three to four square kilometres each. Although males share their large territories with smaller female territories, females do not cross theirs with other females. Most female home ranges contains around 70 hollow log dens and 110 burrows.


Behaviour

A solitary, mostly
terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...
nocturnal Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed sens ...
predator, the western quoll is most active around dusk (
crepuscular In zoology, a crepuscular animal is one that is active primarily during the twilight period, being matutinal, vespertine, or both. This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daylig ...
) when it hunts. It moves swiftly on the ground, climbs efficiently, and may dig or occupy existing burrows. During the day it seeks refuge in hollow logs or earth burrows as dens, and saves energy by lowering its body temperature in its sleep. The western quoll is at the top of the food chain, and depends on resource abundance and a healthy ecosystem. Being a carnivore, the western quoll feeds on large invertebrates and any small animal it can. This includes lizards, birds, frogs, spiders, insects, and small mammals; the largest it will eat is the size of a
bandicoot Bandicoots are a group of more than 20 species of small to medium-sized, terrestrial, largely nocturnal marsupial omnivores in the order Peramelemorphia. They are endemic to the Australia–New Guinea region, including the Bismarck Archipelago t ...
or
parrot Parrots, also known as psittacines (), are birds of the roughly 398 species in 92 genera comprising the order Psittaciformes (), found mostly in tropical and subtropical regions. The order is subdivided into three superfamilies: the Psittacoid ...
. Reintroduced populations in South Australia have been recorded preying on
rabbits Rabbits, also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (which also contains the hares) of the order Lagomorpha (which also contains the pikas). ''Oryctolagus cuniculus'' includes the European rabbit specie ...
and burrowing bettongs. They hunt mostly on the ground, but will climb a tree to grab a bird's egg. A bite to the back of the head kills their larger prey. It possesses an ability to obtain most of its water from its food, which is especially handy for survival during a drought. As
seasonal breeder Seasonal breeders are animal species that successfully mate only during certain times of the year. These times of year allow for the optimization of survival of young due to factors such as ambient temperature, food and water availability, and cha ...
s, western quolls mate between late April to July, and have a peak in June. During this time, the western quoll tends to take up large areas of habitat, and females aggressively defend their territory of 55-120 ha. Male and female quolls meet up only to mate. Although there are occasional cases when more young are produced than can be nursed, most litters range from two to six. There is a
gestational period This is a collection of lists of mammal gestation period estimated by experts in their fields. The mammals included are only viviparous (marsupials and placentals) as some mammals, which are monotremes (including platypuses and echidnas) lay their ...
of 16 to 23 days which is followed by the young living in their mother's shallow pouch. After another seven to fifteen weeks, the young outgrow the pouch and are left in the den while the female forages for food. Weaned at 23 to 24 weeks, western quoll are independent at 18 weeks and are sexually mature at one year of age. The young disperse in November before taking up their own territories.


Decline

The western quoll has declined due to several factors. Land clearing, inappropriate fire regimes, use of pesticides by surrounding farmers, grazing by stock and feral herbivores, illegal shooting, accidental drowning in water tanks, being hit by motor vehicles, entanglement in barbed wire fencing, and poisoning are all responsible for their disappearances. Feral cats have a massive impact; both predation and competition narrow room for the western quoll. As more land became less suitable for living in, the western quoll is forced to move elsewhere. AWC (Australia Wildlife Conservancy) protects this species at Paruna Sanctuary using a comprehensive feral predator control program, which sees feral cat and fox numbers controlled using trapping and baiting.


Reintroductions

There have been ongoing attempts to re-establish the western quoll in parts of its former range. A five-year trial re-introduction of western quoll to the
Flinders Ranges The Flinders Ranges are the largest mountain range in South Australia, which starts about north of Adelaide. The ranges stretch for over from Port Pirie to Lake Callabonna. The Adnyamathanha people are the Aboriginal group who have inhabi ...
in South Australia began in April 2014. Despite the loss of about a third of the first release population (mostly due to predation by feral cats), most of the surviving females bred and sixty joeys were born. , a final release of 15 quolls from Western Australia was carried out in the Flinders Ranges, with a total population of 150. About half of this population was born locally. Monitoring of the population continued for an additional two years. The success of the reintroduction led to relocation of animals from the initial site in the Ikara-Flinders Ranges National Park to the
Vulkathunha-Gammon Ranges National Park The Vulkathunha-Gammon Ranges National Park is a protected area in the Flinders Ranges of South Australia, immediately south-west of and adjacent to the Arkaroola Protection Area. They encompass some of the most rugged and spectacular country i ...
in 2022. The species has been returned to the South Australian arid zone, with a population established at the fenced Arid Recovery Reserve near
Roxby Downs Roxby Downs may refer to. * Roxby Downs, South Australia, a town and a locality * Roxby Council, formerly Municipal Council of Roxby Downs, a local government area See also *Roxby Downs Station Roxby Downs Station was a pastoral lease in centra ...
. Plans are in process to reintroduce the species to
Dirk Hartog Island A dirk is a long bladed thrusting dagger.Chisholm, Hugh (ed.), ''Dagger'', The Encyclopædia Britannica, 11th ed., Vol. VII, New York, NY: Cambridge University Press (1910), p. 729 Historically, it gained its name from the Highland Dirk (Scot ...
in
Shark Bay Shark Bay (Malgana: ''Gathaagudu'', "two waters") is a World Heritage Site in the Gascoyne region of Western Australia. The http://www.environment.gov.au/heritage/places/world/shark-bay area is located approximately north of Perth, on the ...
,
Mount Gibson Sanctuary Mount Gibson Sanctuary is a nature reserve on the northern edge of the Wheatbelt and the southern margin of uncleared rangeland country, north-east of Perth in mid-west Western Australia. The nearest large town is Dalwallinu. It is in the A ...
in WA,
Wardang Island Wardang Island, also known as Waralti (also spelled Waraldi or Wauraltee) is a low-lying 20 km2 island in the Spencer Gulf close to the western coast of the Yorke Peninsula, South Australia. It acts as a natural breakwater, protecting the f ...
as part of the Marna Banggara (formerly Great Southern Ark) project on the southern
Yorke Peninsula The Yorke Peninsula is a peninsula located northwest and west of Adelaide in South Australia, between Spencer Gulf on the west and Gulf St Vincent on the east. The peninsula is separated from Kangaroo Island to the south by Investigator Strai ...
in South Australia, and large fenced reserves in the
Pilliga Forest The Pilliga Forest, sometimes known as the Pilliga Scrub, constitute over 5,000 km2 of semi-arid woodland in temperate north-central New South Wales, Australia. It is the largest such continuous remnant in the state. The forest is loc ...
,
Mallee Cliffs National Park The Mallee Cliffs National Park is a protected national park that is located in the Sunraysia region, in the south-west of New South Wales, Australia. The national park is situated approximately west of Sydney and east of the Murray River ...
and
Sturt National Park The Sturt National Park is a protected national park that is located in the arid far north-western corner of New South Wales, in eastern Australia. The national park is situated approximately northwest of Sydney and the nearest town is , awa ...
, all in NSW. Captive breeding programs have contributed to reintroduction efforts, with
Perth Zoo Perth Zoo is a zoological park in South Perth, Western Australia. The zoo first opened in 1898 and by 2011 housed 1258 animals of 164 species and an extensive botanical collection. It is a full institutional member of the Zoo and Aquarium Ass ...
providing some animals for release.


References


External links

{{Taxonbar, from=Q194252 Dasyuromorphs Vulnerable fauna of Australia Mammals of Western Australia Mammals described in 1841 Endemic fauna of Southwest Australia