. The birds of eastern North America known to occur east of the nineteenth meridian ... Birds. KEY TO FAMILIES. WATEll UIKOS. 13 Xostrils, separaU' not tubular; bill, with cere (a horuy or skin-like covering on base of upper iiiauilible); liind toe, sometimes very small; end of upper mandible (unguis), swollen and somewhat rounded; back and wings, always dark, sometimes sooty, sometimes barred with brown; tail, never white or gray, usunllv very dark; middle tail feathers, longest,. ^ _J Itut only very long in adult birds, sometimes only slightly longer than rest of tail feathers in immature bi
. The birds of eastern North America known to occur east of the nineteenth meridian ... Birds. KEY TO FAMILIES. WATEll UIKOS. 13 Xostrils, separaU' not tubular; bill, with cere (a horuy or skin-like covering on base of upper iiiauilible); liind toe, sometimes very small; end of upper mandible (unguis), swollen and somewhat rounded; back and wings, always dark, sometimes sooty, sometimes barred with brown; tail, never white or gray, usunllv very dark; middle tail feathers, longest,. ^ _J Itut only very long in adult birds, sometimes only slightly longer than rest of tail feathers in immature birds; in l)rowii plumages, the axillars (feathers extending from armpit) are heavily l)arred, brown and white; in other plumages, tlie axillars and under wing coverts are sooty brown or dark slaty brown Family STERCORARUD/E. Skuas and Jaegers. See page Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cory, Charles B. (Charles Barney), 1857-1921; Field Museum of Natural History. Chicago, Special edition printed for the Field Columbian museum
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Keywords: ., bookauthorcory, bookcentury1800, bookdecade1890, booksubjectbirds
