The mountain pygmy possum (Burramys parvus) is a small, mouse-sized (weighs 45 grams (1.6 oz)) nocturnal marsupial of Australia found in dense alpine rock screes and boulder fields, mainly southern Victoria and around Mount Kosciuszko in Kosciuszko National Park in New South Wales at elevations from 1,300 to 2,230 metres (4,300 to 7,320 ft). Ursine Tree-kangaroo