They broke them down into categories, like those that were actual specimens of the animal, or just signs of its presence (like the Sleeping Beauty footprint). They dated each one and located it on a map. But intriguingly, they came to their conclusion after a statistical analysis of the database ( Extinction of the Thylacine, Barry Brook et al., bioRxiv, 19 January 2021, ).Īs they write in their paper, they “collate and characterize the type, quality and uncertainty" of all those reported sightings in the database. The date they suggest is a serious surprise. Why am I telling you about this possibly extinct animal, and this database, in a column that’s ostensibly about mathematics?īecause Brooks and his colleagues used that database to estimate the thylacine’s date of extinction. Barry Brook, a mammal ecologist at the University of Tasmania, has compiled all these reports into what is known as the Tasmanian Thylacine Sighting Records Database. These were just two of over 1,200 reported sightings of Tasmanian Tigers all over Tasmania between 19. He was convinced it was made by a thylacine. He saw a footprint that he later Googled. Then in July 2019, a hiker was climbing up to Sleeping Beauty Mountain, west of Hobart. It was an adult male, he reported later, “with 12 black stripes on a sandy coat". To his astonishment, the beam caught a thylacine, about six or seven metres away. He turned on his torch and swept the beam around him. For example, one night in 1982, a wildlife ranger called Hans Naarding was sleeping in his car in a forest in a remote part of Tasmania.
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