FIELD KEY 37 



2. Under parts white or whitish, streaked or spotted. 



A. Back streaked. 



a.. Length 6.10 inches; outer tail feathers white, show- 

 ing conspicuously when the bird flies; haunts dry 

 fields and roadsides; song, musical. 



VESPER SPARROW, page 88. 



b. Outer tail feathers not white. 

 b l . Length 6.30 inches; breast with numerous spots 

 tending to form one large spot in its center; 

 haunts on or near the ground, generally in the vi- 

 cinity of bushes; call-note, chimp; song, musical; 

 a permanent resident. . . SONG SPARROW, page 92. 



b 2 . Length 6.35 inches; breast grayish with one spot 

 in its center TREE SPARROW, page 167. 



B. Back not streaked; breast spotted. 



a. Length 11.40 inches; tail 5.00 inches; wing-bars 

 white; upper parts, wings, and tail bright cinnamon 

 brown; haunts undergrowth; sings from an exposed 

 and generally elevated position; song, loud, striking, 

 and continuous BROWN THRASHER, page 49. 



b. Length under 9.00 inches; tail under 3.00 inches; 

 no wing-bars; back reddish or cinnamon-brown. 



b 1 . Length 8.25 inches; breast and sides heavily 

 marked with large, round, black spots; head and 

 upper back brighter than lower back and tail; call- 

 note, a sharp pit or liquid quirt. 



WOOD THRUSH, page 44. 



b 2 . Length 7.15 inches; breast with wedge-shaped 

 black spots; sides unspotted, washed with brown- 

 ish-ashy; tail reddish brown, brighter than back; 

 call-note, a low chuck. 



HERMIT THRUSH, page 159. 



