Southern boobook smallest owl on the Australian mainland, the southern boobook is long. The nominate subspecies is the largest. It has short, rounded wings and a short tail, with a compact silhouette in flight. Southern boobooks on the Australian mainland follow Bergmann's rule, in that birds from cooler and more southerly parts of the range tend to be larger. Thus, birds from the Canberra region weigh around while those from the Cape York Peninsula and Broome are around . Females tend to be a little larger and heavier than males, with males weighing and females . The southern boobook has generally dark
Australasian bittern species is listed as endangered. BirdLife International has identified the following sites, all of which are in Australia, as being important for Australasian bittern conservation: Australasian bittern The Australasian bittern ("Botaurus poiciloptilus"), also known as the brown bittern or matuku hūrepo, is a large bird in the heron family Ardeidae. A secretive bird with a distinctive booming call, it is more often heard than seen. Australasian bitterns are endangered in both Australia and New Zealand. The length is from 650 to 750 mm with adults being similar between the sexes while the male is significantly larger. The bird has a