. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. 768 SYSTEMATIC SYNOPSIS. — LONGIPENNES— GA VIM. ^/^"^ South America, questionably occurring in N. Am.; " New Jersey and Long Island " (Audu- bon).
. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. 768 SYSTEMATIC SYNOPSIS. — LONGIPENNES— GA VIM. ^/^"^ South America, questionably occurring in N. Am.; " New Jersey and Long Island " (Audu- bon). 803. S. aleu'tica. (Of the Aleutian Isles. Fig. 517.) Aleutian Teen. Adult: Bill of ordinary shape, as in hirundo, macrura, etc., entirely black. Feet small, as in the species just named, but the webs more deeply incised ; emargination not so great, however, as in Hydrochelidon ; much as in Haliplana. Tibiae bare to the usual extent. Wings and tail exactly as in Sterna proper, the latter, in its length and depth of fork, recalling macrura and forsteri. Crown and nape black ; a large white frontal crescent, the horns of which reach to the posterior border of the eyes, the convexity of which extends into Fig. 517 — Aleutian Tern the nasal fossfe, the concavity of which is opposite the anterior much reduced. border of the eyes ; thus broader than in most species similarly marked. The black vertex sends through the eye a band that crosses the cheeks and reaches the bill just posterior to the point of greatest extensicjn of the feathers on the latter. The chin, auriculars, and other parts of the head bordering this vitta below, are pure white, presently deepening insensibly into the hue of the under parts. Tail wholly pure white; no pearly wash on either vane of any of the feathers. Upper parts at large dark pearl-gray, with a dull leaden hue, different from the clear pearly of macrura, etc., yet not of the smoky cast of panayensis, etc. ; it is a tint intermediate between th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1887
