Tasmanian devil

Tasmanian devil
JJ Harrison (https://www.jjharrison.com.au/) · CC BY-SA 3.0 · source
Name	Tasmanian devil
Status	EN
Status system	IUCN3.1
Genus	Sarcophilus
Species	harrisii
Authority	(Boitard, 1841)
Range map caption	Distribution of the Tasmanian devil (in green)

Tasmanian devil. The Tasmanian devil is a carnivorous marsupial of the family Dasyuridae, now found in the wild only on the Australian island state of Tasmania. It is characterized by its stocky, muscular build, black fur, pungent odor, extremely loud and disturbing screech, and ferocity when feeding. The world's largest surviving carnivorous marsupial, it plays a crucial role in the ecosystem of Tasmania by scavenging carcasses and helping to control populations of invasive species like the European rabbit.

Description and characteristics

The Tasmanian devil has a squat, powerful build reminiscent of a small bear, with males typically larger than females. Its coarse fur is almost entirely black, often with irregular white patches on the chest and rump. The most distinctive features are its large head and powerful jaws, which deliver one of the strongest bites relative to body size of any living mammalian predator, a trait studied by institutions like the University of New South Wales. This adaptation allows it to crush bone and consume entire carcasses, including fur and bone. Its senses of smell and hearing are acute, aiding in nocturnal foraging, while its eyesight is best suited to detecting movement. The species was first described scientifically by French naturalist Pierre Boitard and later placed in the genus *Sarcophilus* by biologist Richard Owen.

Distribution and habitat

Once widespread across mainland Australia, the devil is now extinct there, with fossil evidence suggesting its disappearance coincided with the expansion of the Dingo and possibly climate shifts. Its range contracted to Tasmania, likely before European settlement. Within Tasmania, it is broadly distributed across the state, from coastal heathlands to the edges of urban areas like Hobart and Launceston. It shows a preference for mixed landscapes including dry Eucalyptus forests, woodland, and agricultural margins, requiring dense understory or burrows for daytime shelter. The species is notably absent from the far southwest wilderness areas, which lack suitable denning sites.

Behavior and ecology

Primarily nocturnal and crepuscular, the Tasmanian devil is an adept scavenger and opportunistic hunter. It is a keystone species within the Tasmanian ecosystem, performing a critical cleaning service by efficiently consuming carrion, which helps prevent the spread of disease. While it will hunt small prey such as wallabies and birds, a significant portion of its diet comes from scavenging the remains of animals killed by vehicles on roads like the Bass Highway or by other predators. Devils are not territorial but have large, overlapping home ranges. They are solitary but congregate noisily at large carcasses, with feeding hierarchies established through dramatic displays of gaping, lunging, and their infamous spine-chilling screeches.

Reproduction and lifecycle

The breeding season occurs in March, with females entering estrus for only about three weeks. After a brief gestation of around three weeks, up to fifty tiny, underdeveloped young, called imps, are born and must crawl to the mother's rear-facing pouch. With only four teats, intense competition means typically only a handful survive. The imps remain in the pouch for about four months, after which they are left in a den while the female forages. Young devils become independent by late December or January and reach sexual maturity at about two years of age. Their lifespan in the wild is typically five to six years, though they can live longer in captivity, such as at facilities like the Taronga Zoo.

Conservation status and threats

Listed as Endangered on the IUCN Red List, the Tasmanian devil faces a severe threat from Devil Facial Tumour Disease (DFTD), a rare transmissible cancer first observed in the mid-1990s near Mount William National Park. The disease has caused catastrophic population declines, exceeding 80% in some areas. Conservation efforts are led by the Tasmanian Government's Save the Tasmanian Devil Program, in partnership with organizations like the Australian Wildlife Conservancy. These initiatives include establishing insurance populations on disease-free islands like Maria Island and in mainland sanctuaries, as well as intensive field research. Other threats include vehicle collisions, persecution historically depicted in cartoons from Warner Bros., and potential competition with introduced predators.

Relationship with humans

The Tasmanian devil has a complex history with humans. Early European settlers in Tasmania, such as those from the Van Diemen's Land Company, often viewed it as a threat to livestock and persecuted it vigorously. Its fearsome reputation was cemented in popular culture through the animated Looney Tunes character. However, modern attitudes have shifted dramatically due to the DFTD crisis, transforming the animal into an icon for Tasmanian wildlife conservation. It is a major ecotourism drawcard for operators within Tasmania National Parks. Research into its genetics and disease resistance involves collaborations with international bodies like the Wellcome Trust, aiming to ensure the long-term survival of this unique marsupial.

Category:Marsupials of Australia Category:Fauna of Tasmania Category:Endangered fauna of Australia