Southern boobook age. Brushtail possums ("Trichosurus" spp.) and introduced cats and rats raid the nests for nestlings and eggs, and raptors such as the brown goshawk ("Accipiter fasciatus"), grey goshawk ("Accipiter novaehollandiae"), Australian masked owl ("Tyto novaehollandiae"), and probably powerful owl ("Ninox strenua") seize young birds. Juvenile southern boobooks are at greater risk after bushfires and have perished after being tangled up in dodder ("Cassytha") or bidgee-widgee ("Acaena novae-zelandiae"). The southern boobook generally preys on mice, insects, particularly nocturnal beetles and moths, and birds the size of a house sparrow ("Passer domesticus"). A higher proportion of its diet is invertebrates compared with
Royal Australasian Ornithologists Union the title of Fellow of the Royal Australasian Ornithologists Union (FRAOU) to a small and limited number of individuals. It also recognises excellence in contributions to ornithological knowledge through annual awards: the D.L. Serventy Medal for outstanding published work on birds in the Australasian region, and the John Hobbs Medal for major contributions to amateur ornithology. Royal Australasian Ornithologists Union The Royal Australasian Ornithologists Union, now part of BirdLife Australia, was founded in 1901 to promote the study and conservation of the native bird species of Australia and adjacent regions. This makes it Australia's oldest national birding association. It was