are found in the areas from which reports originate (this concurs with one of Bernard Heuvelmans' theories regarding some sightings). In popular culture The theory of continued Thylacoleo presence on mainland Australia and thylacine presence in Tasmania has been covered on various Television shows including an episode of Animal Planet's show Animal X and on The National Geographic Channel. Individual sightings of the Queensland marsupial tiger continue to appear in newspapers, though in far less numbers than formerly. In the 1970s, naturalist Janeice Plunkett collected over 100 reports of sightings or shootings of "tigers", including reports clearly indicating that the animal observed was a marsupial. Some writers believe that, if the animal did formerly exist, it may now be extinct, given the diminishing numbers of tiger quolls and northern quolls across the same region. See also Drop bear References Australian legendary creatures Purported mammals