Famed for their gaudy plumage, macaws come in many colours, but purple has never been one of them – or has it?The genus Anodorhynchus – the so-called blue macaws - contains three present-day species (though one of them, the glaucous macaw, may have lately become extinct). Interestingly, in terms of plumage colouration, this genus's trio can be arranged in a very neat gradation, beginning with, as its name indicates, the intense hyacinth-blue shade of the hyacinth (or hyacinthine) macaw A. hyacinthinus, then moving subtly into the slightly more turquoise-blue hues of Lear's macaw A. leari, which then transforms further, yielding a paler, turquoise-green shade, in the aptly-named glaucous macaw A. glaucus.
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