<P> Except for its loss from the state of South Australia, the platypus occupies the same general distribution as it did prior to European settlement of Australia . However, local changes and fragmentation of distribution due to human modification of its habitat are documented . Its current and historical abundance, however, are less well - known and it has probably declined in numbers, although still being considered as common over most of its current range . The species was extensively hunted for its fur until the early years of the 20th century and, although protected throughout Australia since 1905, until about 1950 it was still at risk of drowning in the nets of inland fisheries . The platypus does not appear to be in immediate danger of extinction, because conservation measures have been successful, but it could be affected by habitat disruption caused by dams, irrigation, pollution, netting, and trapping . Reduction of watercourse flows and water levels through excessive droughts and extraction of water for industrial, agricultural, and domestic supplies are also considered a threat . The IUCN lists the platypus on its Red List as "Near Threatened". </P> <P> Platypuses generally suffer from few diseases in the wild; however, public concern in Tasmania is widespread about the potential impacts of a disease caused by the fungus Mucor amphibiorum . The disease (termed mucormycosis) affects only Tasmanian platypuses, and has not been observed in platypuses in mainland Australia . Affected platypuses can develop skin lesions or ulcers on various parts of their bodies, including their backs, tails, and legs . Mucormycosis can kill platypuses, death arising from secondary infection and by affecting the animals' ability to maintain body temperature and forage efficiently . The Biodiversity Conservation Branch at the Department of Primary Industries and Water are collaborating with NRM north and University of Tasmania researchers to determine the impacts of the disease on Tasmanian platypuses, as well as the mechanism of transmission and current spread of the disease . </P> <P> Much of the world was introduced to the platypus in 1939 when National Geographic Magazine published an article on the platypus and the efforts to study and raise it in captivity . The latter is a difficult task, and only a few young have been successfully raised since, notably at Healesville Sanctuary in Victoria . The leading figure in these efforts was David Fleay, who established a platypusary--a simulated stream in a tank--at the Healesville Sanctuary, where breeding was successful in 1943 . In 1972, he found a dead baby of about 50 days old, which had presumably been born in captivity, at his wildlife park at Burleigh Heads on the Gold Coast, Queensland . Healesville repeated its success in 1998 and again in 2000 with a similar stream tank . Since 2008, platypus has bred regularly at Healesville, including second - generation (captive born themselves breeding in captivity). Taronga Zoo in Sydney bred twins in 2003, and breeding was again successful there in 2006 . </P> <P> The platypus is kept, for conservation purposes, in special aquariums at the following Australian wildlife sanctuaries: </P>

When did the duck billed platypus become extinct