A mouse-sized native marsupial, not a rodent. It vanishes where foxes are present and returns when they are controlled.

Woodland with logs, litter and dense ground cover to forage and shelter in.
Active year round, day and night.
Native or pest? A pointy face, orange in the coat and many small even teeth means the native antechinus. A blunt face, plain grey coat and two big gnawing teeth means a pest house mouse. Get this right before any rodent control.
An ideal sanctuary species. To be confirmed on the blocks, distinguished cleanly from the house mouse.