Naturalist: The recent claims that the Tasmanian tiger is not extinct are false. The Tasmanian tiger' s natural habitat was taken over by sheep farming decades ago, resulting in the animal' s systematic elimination from the area. Since then naturalists working in the region have discovered no hard evidence of its survival, such as carcasses or tracks. In spite of alleged sightings of the animal, the Tasmanian tiger no longer exists.
The assumption that the Tasmanian tiger did not move and adapt to a different region in response to the loss of habitat is on which the naturalist's argument depends.