By Kreyn Photography / Getty Images Australia listed a small wallaby and the grey snake among 15 new threatened species on Tuesday as it launched a zero-extinction plan for its unique wildlife. Australia listed a small wallaby and the grey snake among 15 new threatened species on Tuesday as it launched a zero-extinction plan for its unique wildlife. Many of Australia’s species are clinging to existence, their habitats shrinking from human activity and extreme events such as the 2019-2020 Black Summer bushfires, wildlife groups say. Prime Minister Anthony Albanese’s government announced a new 1…