. Life histories of North American petrels and pelicans and their allies; order Tubinares and order Steganopodes . of pUimage inthe young: The young are hatched in February, according to Mr. Schlemmer. They thenare covered with a grayish-white down which is soon superseded by a plumageof dark-brown down, assumed by a continued growth of the original coveringand a wearing off of the gray tips. As the young grow older the white featherscome in on the breast and abdomen first, and the brown down is in direct com-munication Mith the terminal barbs of these juvenal feathers, as is, of course,well k
. Life histories of North American petrels and pelicans and their allies; order Tubinares and order Steganopodes . of pUimage inthe young: The young are hatched in February, according to Mr. Schlemmer. They thenare covered with a grayish-white down which is soon superseded by a plumageof dark-brown down, assumed by a continued growth of the original coveringand a wearing off of the gray tips. As the young grow older the white featherscome in on the breast and abdomen first, and the brown down is in direct com-munication Mith the terminal barbs of these juvenal feathers, as is, of course,well known. The feathers of the back also come in about the same time, andthose of the wings, save the quills. At the time of our visit the young wereabout two-thirds grown, the white feathers of the breast and abdomen havingin most cases the api>earance of the adult, but the rest of the body was coveredwith long brown down, except on the head, where it was short. The beaks ofthe young are dark dirty gray or brownish gray, while those of the adult arelight greenish. • ^ U. S. NXTIONAL MUSEUM BULLETIN 121 PL. 6. Laj-san IsUiiid. \V. Iv. FislRT.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirdsno, bookyear1922
