The thylacine (Thylacinus cynocephalus), commonly called the Tasmanian tiger, was the largest carnivorous marsupial of modern times. Officially extinct since the death of the last captive animal, Benjamin, at Hobart Zoo on September 7, 1936, the thylacine has been the subject of a sustained, multi-generational campaign of sighting reports from Tasmania, mainland Australia, and New Guinea. The Tasmania Parks and Wildlife Service maintains an official register of post-1936 sightings that now contains more than 3,800 entries. Roughly a dozen per year continue to be filed, concentrated in the Tarkine rainforest, the Western Tiers, and the Styx Valley old-growth region.
Among the most credible modern cases: in March 1982, Tasmanian National Parks ranger Hans Naarding observed a thylacine for several minutes at close range from his vehicle in the Arthur-Pieman Conservation Area in the state's north-west, describing the animal's stripes, stiff tail, and gait in specific scientific detail. His report, made to his superiors, led to an eighteen-month confidential search that failed to produce additional evidence. In 1995, Parks officer Peter Simon photographed what he described as a thylacine paw print near Derwent Bridge. In February 2017, residents of the Clifton Springs area on the Bellarine Peninsula in Victoria (well outside the animal's historic range) reported grainy but suggestive video footage to the Centre for Fortean Zoology. Professor Barry Brook of the University of Tasmania, using Bayesian analysis of sighting-frequency data, published a 2023 paper concluding a very small residual probability that the species survived until at least the 1980s.
The thylacine's significance extends beyond cryptozoology. Its 1936 extinction — only 59 days after legal protection was finally granted — is a foundational case in conservation biology. The animal's persistent rumor continues to shape Tasmanian ecological policy, has driven hundreds of camera-trap and scat-DNA investigations, and maintains the world's highest cryptid-to-scientific-funding ratio. The thylacine is Australia's national cryptid of unfinished business.