Systematics and Naming
It is possibly (though not certainly) a little closer related to Cacatua than the Galah, and its lineage diverged around the time of or shortly after the acquisition of the long crest – probably the former as this crest type is not found in all Cacatua cockatoos and therefore must have been present in an early or incipient stage at the time of the divergence of the Major Mitchell's Cockatoo's ancestors. Like the Galah, this species has not lost the ability to deposit diluted pigments dyes in its body plumage, although it does not produce melanin coloration anymore, resulting in a lighter bird overall compared to the Galah. Indeed, disregarding the crest, Major Mitchell's Cockatoo looks almost like a near-leucistic version of that species (see also "External links" below). Another indication of the early divergence of this species from the "white" cockatoo lineage is the presence of features found otherwise only in corellas, such as the plaintive yodeling cry, as well as others which are unique to Major Mitchell's and the true white cockatoos, for example the large crest and rounded wing shape.
The scientific name commemorates the British naturalist, Benjamin Leadbeater. In Central Australia south of Alice Springs, the Pitjantjatjara term is kakalyalya.
Read more about this topic: Major Mitchell's Cockatoo
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