36 FIELD KEY. 



t-l Length 12.25 inches; sHm, brownish birds with 



long tails; flight short and noiseless; perch in a 



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



cluck-cluck, and cozv-cow. 



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



B. Back brO'vnish, 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 cJiippy-chippy-cJiippy. 

 Chipping Sparrow, page 90. 



a'. Length 5.70 inches; bill reddish broivn, back 

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

 whitish; haunts dry. bushy fields and pastures; 

 song, a musical, plaintive cJicr-iuee, chcr-wcc, cher- 

 zi'ee, cheeo, dce-dee-dce-dee. 



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- 

 zi'cet-zccct. etc Swamp Sparrow, page 167. 



b. Crown not rufous or chestnut. 



&\ 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. 



6". Length 5.20 inches; bill slender; a w^hite line 

 over the eye; tail carried erect; haunts reedy 

 marshes; call-note scolding; song rippling. 



Long-billed j\L\rsh Wren, page 56. 



