The Western Pygmy Possum lives in a wide range of habitats from tall open forests to low shrubby heaths. It builds a small leaf lined nest in hollow logs, in dense clumps of vegetation, or within an abandoned birds nest. Its diet includes pollen, nectar, fruits and a variety of invertebrates. Like its better known possum relatives, the Western Pygmy Possum is an extremely agile climber. Every year, it breeds two or three litters of up to six young. Like many small marsupials, it becomes inactive during cool weather or periods of food shortage.

Distribution of the Western Pygmy Possum in Australia.