Quokka
Setonix brachyurus

Quokka are small marsupials found in a sparse population along the south-west coast of WA and on Rottnest and Bald Islands. On Rottnest, they are very tame and are used to a range of arid habitats, while on the mainland, they require wet dense forest. They are listed as vulnerable due to predation from foxes and loss of habitat. The body is 41-54 cm and the tail 25-31 cm. The first photo is an adult male and the second a juvenile.
 

1-2: Rottnest Island, WA, 03/12/2011.