36 FIELD KEY 



c^ Length 12.25 inches; slim, brownish birds with 

 long tails; flight short and noiseless; perch in a 

 tree, not in an exposed position; note tut-tut, 

 cluck-cluck, and cotv-cozv. 



Yellow-billed Cuckoo, Black-billed Cuckoo, page 130. 



B. Back brownish, streaked. 

 a. Crown rufous or chestnut without streaks. 

 a\ Length 5.25 inches; bill black; a whitish line 

 over the eye; a familiar bird of lawns and door- 

 yards; song, a monotonous chippy-chippy-chippy. 

 Chipping Sparrow, page 90. 



a". Length 5.70 inches; bill reddish brozvn, back 

 rufous or rufous-brown; wing-bars and eye-ring 

 whitish; haunts dry, bushy fields and pastures; 

 song, a musical, plaintive cher-zvee, cher-zvce, cher- 

 zvee, chceo. dee-dee-dcc-dcc. 



Field Sparrow, page 91. 



a^ Length 5.90 inches; forehead black; crown and 

 wings chestnut-rufous; flanks pale grayish brown; 

 haunts marshes; song, a rapidly repeated zveet- 

 zveet-zveet, etc Swamp Sparrow, page 167. 



b. Crown not rufous or chestnut. 



b\ Length 6.75 inches; crown blackish, with a cen- 

 tral 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 167. 



b'. Length 5.20 inches; bill slender; a white line 

 over the eye; tail carried erect; haunts reedy 

 marshes; call-note scolding; song rippling. 



Long-billed Marsh Wren, page 56. 



