. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . o-rptyl, strigx, Lat. strir, a screech-owl.) Gray Owls. Brown Owls. Skull and ear-parts more or less unsymmetrical, the latter large, furnishedwith a moderate operculum s
. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds . o-rptyl, strigx, Lat. strir, a screech-owl.) Gray Owls. Brown Owls. Skull and ear-parts more or less unsymmetrical, the latter large, furnishedwith a moderate operculum scarcely reaching the whole length of the opening. Head verylarge, appearing as broad as the body, and perfectly smooth, there being no plumicorns : facialdisc complete and of great extent, the comparatively small eyes centric in the radiating in edge of cere, which is shorter than rest of culmen. Bill yellow ; iris yellow orblack. Tail very long, | to f as long as the wings. Wings much rounded ; 4 to 6 primariessinuate on inner webs; 1st quite short. Feathering of feet variable ; tarsus always feathered,but toes wholly or partly feathered, or naked. A large genus of earless owls, chiefly of thenorthern hemisphere, of medium to very largest size. North America has at least three per-fectly distinct species; the commonest one of these, S. nebidosa, represents the Europeantawny owl, S. STEIGIDZE: OTHER OWLS. 509 Analysis of Species. Under parts streaked on the breast, elsewhere barred. Iris yellow. Six quills sinuate. Of immense size; length 2 feet or more ; toes denseljfeathered. Northern cinerea 474 Under parts barred on the breast, streaked. Iris black. Five quills medium size : length about l^ feet. Toes fully feathered. Eastern nebulosa 476 Toes mostly naked. Florida alleni 477 Under parts barred everywhere. Iris black. Five quills sinuate. Of medium size ; toes fully feathered. Western occidentalis 478 S. cinerea. (Lat. cinerea,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
