The Tasmanian Devil (Sarcophilus harrisii), also referred to simply as "the devil", is a carnivorous marsupial now found in the wild only in the Australian island state of Tasmania. The Tasmanian Devil is the only extant member of the genus Sarcophilus. The size of a small dog, but stocky and muscular, the Tasmanian Devil is now the largest carnivorous marsupial in the world after the extinction of the Thylacine in 1936. It is characterised by its black fur, offensive odor when stressed, extremely loud and disturbing screech, and viciousness when feeding. It is known to both hunt prey and scavenge carrion and although it is usually solitary, it sometimes eats with other devils.
The Tasmanian Devil became extirpated on the Australian mainland about 400 years before European settlement in 1788. Because they were seen as a threat to livestock in Tasmania, devils were hunted until 1941, when they became officially protected. Since the late 1990s devil facial tumour disease has reduced the devil population significantly and now threatens the survival of the species, which in May of 2008 was finally declared to be endangered. Programs are currently being undertaken by the Tasmanian government to reduce the impact of the disease.
Naturalist George Harris wrote the first published description of the Tasmanian Devil in 1807, naming it Didelphis ursina. In 1838 the devil was renamed Dasyurus laniarius by Richard Owen, before being moved to the genus Sarcophilus in 1841 and named Sarcophilus harrisii, or "Harris's meat-lover", by Pierre Boitard. A later revision of the devil's taxonomy, published in 1987, attempted to change the species name to Sarcophilus laniarius based on mainland fossil records of only a few animals. However, this was not accepted by the taxonomic community at large and the name S. harrisii has been retained and S. laniarius relegated to fossil species. Phylogenetic analysis shows that the devil is most closely related to quolls, and more distantly to the extinct Thylacine (Tasmanian Tiger).