Gilbertâs potoroo has a highly unusual diet for a mammal, feeding almost entirely on fungi. established a long-nosed potoroo colony in 2000 in order to reï¬ne dietary and husbandry requirements and to develop artiï¬cial insemination procedures for the closely related Gilbertâs potoroo.11 The Gilbert's potoroo (Potorous gilbertii), sometimes called the "rat-kangaroo", is a critically endangered species of potoroo which lives in small groups or colonies. John Gilbert collected the first specimens of Gilbert's Potoroo at "King George's Sound" in 1840 and alerted his employer Its life expectancy is about 7-10 years. Gilbert had collected several animals at King George Sound in Australia, including this potoroo. It has a long almost-hairless tail. Gilbert's potoroo (Potorous gilbertii) is the world's rarest marsupial. It has dense grey-brown fur, paler on the underside, with furry jowls, large eyes and an almost hairless tail. The long-nosed potoroo (Potorous tridactylus) is a species of potoroo.These small marsupials are part of the rat-kangaroo family. Gilbert's potoroo (Potorous gilbertii), sometimes called the "rat-kangaroo" or "garlgyte", is Australia's most endangered marsupial and one of the world's most endangered mammals. To prevent the extinction of Gilbert's potoroos, scientists estimate that the population must be increased to at least 500 individuals in order to provide sufficient genetic variation (the current population size is unknown). About the plan Gilbert's Potoroo, Potorous gilbertii (Gould, 1841), is a small macropodoid marsupial in the family Potoroidae. Australia's most endangered marsupial, the Gilbertâs potoroo, has hope for a better future, with a population genetics study delivering promising results for the species. Discovery. The long-nosed potoroo contains two subspecies, P. t. tridactylus from Mainland Australia, and P. t. apicalis from Tasmania, which tends to have lighter fur than P. t. tridactylus. Less than 50 mature Gilbertâs potoroos are known to occur in the wild at one very small site. Adults range from 900 g to 1200 g and there is little sexual dimorphism. Gilbertâs potoroo was not seenagain for many years, even though many people had searched for them in the 1970s. Its body has large amounts of fur which helps with insulation, and its fur ranges between brown and grey; the color fading on its belly. It is a small nocturnal marsupial which lives in small groups or colonies. It has long hind feet and front feet with curved claws which it uses for digging food. Potoroo is a common name for species of Potorous, a genus of smaller marsupials.They are allied to the Macropodiformes, the suborder of kangaroo, wallaby, and other rat-kangaroo genera.All three extant species are threatened by ecological changes since the colonisation of Australia, especially the long-footed Potorous longipes and P. gilbertii (Critically Endangered). The body, but not the tapered tail, is densely furred. The first scientific discovery of the Gilbertâs potoroo happened in 1840, and it was named in 1841 after the English naturalist and explorer John Gilbert. It has long hind feet and front feet with curved claws which it uses to dig for food. It has large eyes, thick greyish-brown fur on the top of its body and paler fur on its underside. Fire is the biggest threat to Gilbert's potoroo, as it lives in extremely fire prone vegetation. The animals are likely vulnerable to disease due to lack of genetic variation. 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