by William Swainson, Zoological Illustrations — Vol I. Pl… (1820)
“ Inner wing-covers deep black; the under plumage is a light-brown, changing to lilac on the ears and sides of the neck, and tinged with cinereous on the flanks and vent: the chin is white; tail even, the two middle feathers blue, the rest more or less black, having the external margins and tips blue. The outer quill of the wings is short, the second and third longest and equal, the fourth rather less; the hind toe with the claw, measures one inch in a straight line. ”
