Three females and one male of Gymnorhina recently collected near Wlluna, Western
Australia are described. Two females are exactly like the White-backed Magpie G. hypoleuca
leuconota. The other specimens are possibly hybrids between the Black-backed
Magpie G. tibicen longirostris and the Western Magpie G. dorsalis, hybrids between
longirostris and leuconota or hybrids between all three forms. The presence of leuconota
or partly leuconota phenotypes may be caused by escaped pets introduced by pastoralists
in mid-Western Australia or by leuconota having a range that extends westwards from
Eyre Peninsula through the Nullarbor Plain and Great Victoria Desert. Alternatively, some
hybrids betwen longirostris and dorsalis resemble leuconota.
