Morepork they conceded the two were easily distinguishable in appearance, so maintained the three as subspecies; the Tasmanian boobook only diverged by 2.7% from the other two, while the powerful and rufous owls diverged by 4.4% from each other. Leading from this, the southern boobook was split from the Tasmanian boobook and morepork in volume 5 of the "", however several authors, including Les Christidis and Walter Boles, contested that the data had been misinterpreted from the Norman study, which had not sampled any Australian mainland boobooks at all. They treated the three taxa (southern, Tasmanian boobooks, and moreporks) as a
Australasian pipit New Zealand due to the improvement of pastures, use of pesticides and predation by introduced species. A number of subspecies are recognised: Australasian pipit The Australasian pipit ("Anthus novaeseelandiae") is a fairly small passerine bird of open country in Australia, New Zealand and New Guinea. It belongs to the pipit genus "Anthus" in the family Motacillidae. It was formerly lumped together with the Richard's, African, Mountain and Paddyfield pipits in a single species: Richard's pipit, "Anthus novaeseelandiae". Some authors split the Australasian pipit further into two species: Australian pipit ("Anthus australis") in Australia and New Guinea and New Zealand pipit