Habitat use by the eastern pygmy-possum in a coastal woodland–heathland mosaic

Abstract

Understanding patterns of habitat use is required to conserve species and to manage their habitats. I used detections of 156 individual eastern pygmy-possums (Cercartetus nanus) within artificial cavities to investigate habitat use across 18 ha of a woodland–heathland mosaic. Detection of breeding females was highest in autumn (March to May) and winter, during the flowering period of Banksia ericifolia. Detection was over two times higher in woodland compared with heathland. This pattern was not influenced by variation in flowering or hollow abundance, which were equivalent across the two habitats. Protection from the weather may drive this pattern. Adult males were detected most frequently in autumn, coinciding with the beginning of female reproduction. They were detected equally in woodland and heathland. Why detection was lower in winter and spring is unclear but may arise from female aggression, forcing males to use natural shelters away from lactating females. Subadults were detected most frequently in spring and summer, coinciding with independence and dispersal. Subadults preferred woodland, reflecting where they were reared. This study has provided new insights into the behavioural ecology of this species, but further studies are needed to better understand how foraging and breeding influence shelter site use.