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 darter but covered in a layer of chalky lime, and become progressively scratched and stained over the incubation period. Australasian darter The Australasian darter or Australian darter ("Anhinga novaehollandiae") is a species of bird in the darter family, Anhingidae. It is found in Australia, Indonesia, and Papua New Guinea. It weighs around 2.6 kg and spans 86–94 cm (34–37 in) in length. John Gould described the Australasian darter as "Plotus novaehollandiae" in 1847. Closely related to American ("Anhinga anhinga"), African ("Anhinga rufa"), and Oriental ("Anhinga melanogaster") darters, the Australasian darter has been classed as a subspecies of the African or African