. The water birds of North America . n ; bare space on chinand throat jet-black ; bill pale violet, bare space on forehead, and base of lower mandible,purplish red ; bare space round eye violet-blue ; feet coral-red. Length, inches; extent, SULIDJ3 — THE GANNETS — SULA. 183 ; wing, ; tail, ; culmen, ; depth of bill through base, ; tarsus, ;middle toe, Younger: Upper tail-coverts and tail as in the preceding ; rest of the plumagesooty gray, the head and neck paler, sometimes nearly white. Bill lead-color, with a band 1yellow across the forehead and two yel
. The water birds of North America . n ; bare space on chinand throat jet-black ; bill pale violet, bare space on forehead, and base of lower mandible,purplish red ; bare space round eye violet-blue ; feet coral-red. Length, inches; extent, SULIDJ3 — THE GANNETS — SULA. 183 ; wing, ; tail, ; culmen, ; depth of bill through base, ; tarsus, ;middle toe, Younger: Upper tail-coverts and tail as in the preceding ; rest of the plumagesooty gray, the head and neck paler, sometimes nearly white. Bill lead-color, with a band 1yellow across the forehead and two yellow patches at the base of the lower mandible ; feet andlegs red (W. T. March, manuscript). Young, first plumage (77905, Dominica, West Indies,April, 1879 ; Dr. H. A. Nicholls) : Above, sooty grayish brown, the remiges and rectrices hoaryslate ; head, neck, and lower parts light smoky gray. Bill blackish. Older?: Similar, but lowerparts, posterior to the breast, dirty white, the head and neck sooty grayish brown ; bill The plumage of this species is so exceedingly variable as to render it quite doubtful whether thevarious phases noted (scarcely two examples in a series of fourteen specimens being alike) arewholly dependent on age or sex. Some examples in the immature dress have the head, neck, andjugulum (!) nearly white, the remaining lower parts light sooty gray ; while others (apparentlyyounger) have the head, neck, and jugulum dark sooty brown, and the lower parts whitish —justthe reverse. At all stages it may be distinguished from .S. eucogastra by the red feet and, usually,the smaller size, especially of the bill and feet. In all adult examples, and in most young ones, the red color of the feet is sufficient to distin-guish this species from S. leucogastra, independent of the shorter bill and difference of are two young specimens 2 in the collection, however, which, although apparently havingreddish feet (it being, of course, impossible to t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
