. The water birds of North America . iform dusky. Bill greenish black, scarcely swollen at thebase, where the black spot of the male is slightly, if at all, indicated ; iris yellowish white ; feetyellowish orange, webs grayish dusky, claws black (Adddbon). Young: Similar to the adultfemale, but head with two quite distinct whitish patches, one against the lateral base of the bill,the other over the auriculars, behind and below the eye ; plumage above, more uniform than inthe adult female, and feathers everywhere of a softer texture. Total length, about inches ; extent,
. The water birds of North America . iform dusky. Bill greenish black, scarcely swollen at thebase, where the black spot of the male is slightly, if at all, indicated ; iris yellowish white ; feetyellowish orange, webs grayish dusky, claws black (Adddbon). Young: Similar to the adultfemale, but head with two quite distinct whitish patches, one against the lateral base of the bill,the other over the auriculars, behind and below the eye ; plumage above, more uniform than inthe adult female, and feathers everywhere of a softer texture. Total length, about inches ; extent, ; wing, ; culmen, ; from tip of bill to lateral base, ; distance through base of bill horizontally, betweenmost prominent point of lateral swellings, ; tarsus, ; middle toe, (twenty examples). There is considerable variation among individuals of this species, but we find no constantdifference between specimens from the Atlantic coast and those from the Pacific. Occasionally, in. 100 LAMELLIKUSTUAL SWIMMERS — ANSEKES. specimens which appear to be fully adult (as No. 12727, $, Washington, D. C. ; C. Drexler),the white patch on the crown is entirely absent, that on the nape being present, as usual. Anexample from Sitka (No. 462G0 ; F. Bischoff) has, in addition to the usual white patches (oncrown and nape), a white bar across the lower part of the foreneck, and a longitudinal streak ofthe same on the chin. The bill, in fully adult examples, occasionally has other black markingsbesides the large black spot near the base. Thus, No. 31727, Yukon River, Alaska, has a blackspot at the base of the culmen ; in some others there is a small black spot on each side of the maxilla, near the end. Dr. Otto Finsch hassent to Professor Baird drawings of thehead of a Scoter from Alaska, which isquite different in many respects from anyexample we have seen of P. bill is very different in shape from thatof the common specie
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
