The three species over the genus Zanda are actually variously regarded as two, then as a person species for quite some time. In the 1979 paper, Australian ornithologist Denis Saunders highlighted the similarity between the quick-billed and also the southern race xanthanotus over the yellow-tailed and handled them as 1 https://lorenzojjcox.topbloghub.com/43333012/how-much-you-need-to-expect-you-ll-pay-for-a-good-umbrella-cockatoo-mating