The three species around the genus Zanda are already variously regarded as two, then as 1 species for quite some time. Within a 1979 paper, Australian ornithologist Denis Saunders highlighted the similarity in between the small-billed plus the southern race xanthanotus about the yellow-tailed and handled them as 1 species https://emiliorxfoq.blogs-service.com/67455260/about-citron-crested-cockatoo-for-sale-uk