A significant south-western range extension for the desert mouse (Pseudomys desertor) in Western Australia

The desert mouse (Pseudomys desertor) is one of the most common and widespread native rodent species across arid and semiarid Australia. The species occurs in a variety of habitats and like many arid-zone rodents, its distribution and abundance is known to fluctuate with environmental conditions. Following the capture of a suspected specimen of P. desertor outside the current known range of the species, we used molecular-based methods to confirm the specimen's identification as P. desertor. This note presents a record of the species north of Dalwallinu, Western Australia, which represents a significant range extension for the species of 324 km from the nearest confirmed record.