Australasian owls comprise a unique mix of species, largely categorized into hawk-owls (Ninox) and barn-owls (Tyto), with the Southern Boobook being the most common. Key species include the large, forest-dwelling Powerful Owl, the bark-like calling Barking Owl, and the ground-nesting Australasian Grass-Owl. Many species are known for their distinct, often non-traditional, owl calls.