Range.--Breeds in New England, New York and west along the northern tier of states, north into Maritime Provinces and Canada; winters from Gulf states southward.
=649. Sennett Warbler= (_Compsothlypis nigrilora_). L. 4.5. Similar to No. 648, but yellow below reaching to belly; breast without black and with only a slight brownish wash; lores and ear-coverts black. _Notes._ Song probably resembles that of No. 648.
Range.--Lower Rio Grande Valley south into eastern Mexico.
=746. Verdin= (_Auriparus flaviceps_). L. 4.2; W. 2.2; T. 1.9. _Ad._ [Male]. Head and throat yellow; forehead usually with some concealed orange-brown; lesser wing-coverts reddish chestnut; back brownish gray; belly whitish. _Ad._ [Male]. Similar, but less yellow.
Range.--Southern border of the United States and northern Mexico from southern Texas to southern California; north to southwestern Utah and southern Nevada.
=746a. Baird Verdin= (_A. f. lamprocephalus_). Similar to No. 746, but tail shorter; wing somewhat shorter; yellow of head brighter; W. 2.0; T. 1.6. (Oberholser.)
=650. Cape May Warbler= (_Dendroica tigrina_). L. 5.1. _Ad._ [Male]. Ear-coverts and wash on throat chestnut; crown blackish; back olive-green with black spots; below yellow streaked with black; wing-coverts broadly white; outer tail-feathers with white. _Ad._ [Female] _and Yng._ [Male]. Duller; crown like back; no chestnut. _Yng._ [Female]. Above olive-gray; below whitish faintly tinged with yellow; wing-bars, narrow. _Notes._ Song, a wiry "_a-wit_, _a wit_, _a-wit_, _a-wit_", repeated. (Butler.)
Range.--Eastern North America; breeds from northern New England, rarely, and Manitoba north to Hudson Bay region; winters south of United States.
=652. Yellow Warbler= (_Dendroica æstiva_). L. 5.1. Inner vanes of tail-feathers yellow. _Ad._ [Male]. Crown _yellow_, back bright yellowish green; below yellow thickly streaked with reddish brown. _Ad._ [Female]. _and Yng._ [Male]. Duller above, crown like back; below much paler, few or no streaks. _Yng._ [Female]. Similar to last but still duller. _Notes._ Song, a rather loud _wee-chee_, _chee_, _chee_, _cher-wee_, variable in form but recognizable in tone.
Range.--North America, except Alaska, Pacific coast from Vancouver north, and southwestern United States (western Texas to Arizona). (Ridgw.); breeds throughout most of its range, and winters in Central and South America.