Robert Ridgway,
Birds of North and Middle America
(1911)
“ Plumage soft and full, that of the rump much developed and fluffy; pileum not crested. Coloration. — Adult males black above, conspicuously streaked with white, the wing with two broad white bands, or else plain gray or slate color above, with small white tips to wing-coverts, the tail with white terminal spots ”
