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"Rhynchophanes maccowni. Black-breasted Longspur. Bay-winged Longspur. Upper parts slate-gray, streaked with dusky and grayish or yellowish-brown, especially on the interscapulars. No cervical collar, but a chestnut patch on the wings, formed by median coverts. Crown jet-black, bounded by a white superciliary line; sides of head whitish, but auriculars more or less slaty. Throat white, bounded by firm black maxillary stripes. Breast jet-black in broad crescentic form, sharply defined against the white throat, shading behind into slaty-blackish, becoming more and more mixed with white on the belly and sides, till posteriorly the parts are pure white; lining of wings white. All the tail-feathers, except the middle pair, and bases and tips of intermediate ones, white, ending squarely across both webs. Bill blackish-plumbeous, pale at base below; feet brownish-black. Elliot Coues, 1884

Black-breasted Longspur

"Rhynchophanes maccowni. Black-breasted Longspur. Bay-winged Longspur. Upper parts slate-gray, streaked…