J2 FIELD KEY TO COMMON BIRDS. 



b. Crown not rufous or chestnut. 



J. Length 6-75 inches; crown blackish, with a central whitish stripe \ 

 throat white ; breast gray ; a yellow spot before the eye ; haunts 

 in and about thickets and bushy woodlands ; song, a high, clear, 

 musical whistle ; call-note, chink. 



WHITE-THROATED SPARROW, page 143. 



b*. Length 5-20 inches; bill slender; a white line over the eye; 

 tail carried erect ; haunts reedy marshes ; call-note scolding ; 

 song rippling; May to Oct. 



LONG-BILLED MAKSH WREN, page 177. 

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



A. Back streaked. 



a. Length 6-10 inches ; outer tail-feathers white, showing conspicuously 

 when the bird flies ; haunts dry fields and roadsides ; song musical ; 

 Apl. to Nov VESPER SPARROW, page 141. 



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 vicinity of bushes; call-note, cftimp; song musical; a per- 

 manent resident SONG SPARROW, page 138. 



i. Length 6-35 inches; breast grayish with one spot in its center; 

 Oct. to Apl TREE SPARROW, page 146. 



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 ; Apl. 25 to Oct. . . BROWN THRASHER, page 175. 



b. Length under 9-00 inches; tail under 3-00 inches; no wing-bars; 

 back reddish or tin namor -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 ; May to Oct. 



WOOD THRUSH, page 184. 



J*. Length 7'15 inches; breast with wedge-shaped black spots; sides 

 unspotted, washed with brownish ashy ; tail reddish brown, brighter 

 than back ; call-note, a low chuck ; Apl. 10 to May 10 ; Oct. and 

 Nov HERMIT THRUSH, page 185. 



b 9 . Length 7-50 inches ; upper breast lightly spotted with small, wedge- 

 shaped, brownish spots ; tail the same color as the back ; sides white ; 

 call-note, a clearly whistled wheeu ; May to Sept. 



WILSON'S THRUSH, page 183. 

 C. Length under 9-00 inches ; tail under 3*00 inches ; no wing-bars ; back 



olive-green. 



c. Length 6-10 inches ; center of crown pale brownish bordered by 

 black; haunts on or near the ground in woodland; a walker; 

 song, a ringing crescendo, teacher, teacher, TEACHER, TEACHER, 

 TEA CHER; May to Sept OVEN-BIRD, page 170. 



