Thylacinidae or the Tasmanian tiger, also known as Thylacine, is a marsupial that was once native to Tasmania, Australia, and New Guinea. It is believed to have gone extinct in the 20th century. There are several synonyms for Thylacinidae, including Tasmanian wolf, Tasmanian hyena, and marsupial wolf. The animal was known for its distinctive stripes on the lower back, which resembled that of a tiger. Its diet consisted of small mammals such as wallabies and possums. Despite its extinction, the Thylacinidae remains a fascinating creature and has been the subject of many studies and documentaries.