The Western Australia Department of Biodiversity, Conservation and Attractions (DBCA) targeted Beacon and Gun Islands in the Houtman Abrolhos in May, where invasive house mice remained despite the broader national park being largely free of the introduced rodents.

Almost 580kg of rodent bait was used across the two islands off mid-coast Western Australia in a major assault.

Now, the DBCA says the mice might finally be all gone.