The three species around the genus Zanda are already variously considered as two, then as a single species for pretty some time. In a very 1979 paper, Australian ornithologist Denis Saunders highlighted the similarity between the brief-billed together with the southern race xanthanotus on the yellow-tailed and dealt with them https://umbrella-cockatoo-breeder96159.madmouseblog.com/17098195/the-best-side-of-cockatoo-health-guarantee-uk