Morepork though he followed Mees in treating them as a single species. Janette Norman and colleagues tested the cytochrome "b" DNA of three subspecies (as well as the powerful and rufous owls) to ascertain whether the closest relative was used in breeding with the last surviving female of the Norfolk boobook. They discovered that although the Norfolk boobook was similar in plumage to the Tasmanian boobook, it was genetically much closer to the New Zealand subspecies. In fact, the two were so close genetically that they considered whether the Norfolk boobook should be recognised as a separate taxon at all, although
Australasian Individual Speedway Championship Stadium in Auckland, was won by Maury Dunn. In the years 1970, 1971 and 1972, an Australasian Grand Prix meeting was held at the Liverpool Speedway in Sydney on the original "D" shaped track and not the bike track that was built on the infield in 1974 when the Liverpool track surface was changed to asphalt. All three Australasian GP's were won by New Zealand's Ivan Mauger. The first Australasian Final qualifier was held at the Western Springs Stadium on 21 February 1976 with dual Australian Champion John Boulger emerging as the winner. The last Final was held at the