. The water birds of North America [microform]. Birds; Water-birds; Oiseaux; Oiseaux aquatiques. 320 LONG-WINGED SWIMMERS — LONGIPENNES. ftbnipt and marked contrast with the sooty V)luek of the lores and orbital region. Only the upiicr half of thj head is blackish, this color forniiiig a well-defined "hood," as in the species o{ Sterun. its lower edge on a line with the rictus, and including the auriculars ; the lower eyel'.d Iniing niarkiil by a whitish crescent. Only one exanii)le in the very large series of American si)eciniens a]>i)roaoliis the darkest-colored individual from
. The water birds of North America [microform]. Birds; Water-birds; Oiseaux; Oiseaux aquatiques. 320 LONG-WINGED SWIMMERS — LONGIPENNES. ftbnipt and marked contrast with the sooty V)luek of the lores and orbital region. Only the upiicr half of thj head is blackish, this color forniiiig a well-defined "hood," as in the species o{ Sterun. its lower edge on a line with the rictus, and including the auriculars ; the lower eyel'.d Iniing niarkiil by a whitish crescent. Only one exanii)le in the very large series of American si)eciniens a]>i)roaoliis the darkest-colored individual from Europe, and even in this instance the dift'erenoe is very decided. lu his paper on the Steniime (P. Z. S. 1876, p. (»43), published subseiiuently to Dr. Coues's niomi-. r* s k: Winter plumage. graph in "Birds of the Northwest," Mr. Ilowaitl Saunders remarks as follows concerning tlic differences lietween the Amei'iciin and the European birds of this species : — "In almost all the adult American specimens which I have — abmt a dozen in num- ber— the black of the under parts is of a deeper and more sooty brown lint than in any Europcun examples out of upwards of a hundred from various localities, the black being as dark as in //. Icucopiera — an intensity of hue which our form never possesses. In two or three examples, however, all females, the lightest colored American birds approach more closely to very daik from Europe ; and in tiie young and winter plumage the two forms are absolutely undis- tinguishable ; so that any specific separation is out of the (; The geographical difference in coloration as exhibited in the series before us, which in lU'o- portionate numbei-s of the two forms is just the reverse of that examinens, occasionally and in small nnmliers in others. It is found throughout Central America and Mexico, and in South America as far south at least as Chili, and north to the Fur Regions and Hudson's ISay.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
