FIELD KEY TO CnM:\rOX BIRDS. gl 



a». Length 5-75 inches; a white line over the eye not bordered by 

 bhxck ; prefers the upper branches of rows of elms and other sliade 

 trees; soni;-, a ricli, iinhri)ken warble with an alto undertone; May 

 to Sei^t Wakbling Viueo, page 222. 



a^. Length 4-00 inches; no white line over the eye; eye-ring and 

 wing-bars white; a tiny, unsuspicious bird; flits about the outer 

 branches of trees and shrubs ; wings twitclied nervously ; note, 

 cfick; song, a remarkably loud, musical whistle; Sept. and Oct.; 

 Apl. and May Ruby-ckowned Kinglet, page 252. 



b. Back olive-green or dusky olive; flycatchers who capture their prey 

 on the wing by darting for it, and while perching are quiet and erect, 

 i'. Length 7'00 inches; trequcntly found nesting under bridges or 



about buildings; crown blackisli ; tail wagged nervously; notes, 



pee, 2}ee, and pewit-pf^oebe■, Mch. to Oiit. . . . Piicebe, page 154. 

 b'^. Length 6'50 inches; haunts wooded growths; note, a plaintive 



pee-a-ivee; May to Sept Wood Pewee, page 158. 



b^. Length 5'40 inches; haunts oreliards, lawns, and open woodlands ; 



note, chcbec, cliebec Least Flycatcher, page 156. 



c. Back gray or bluish gray. 



fi. Length ()-50 inches ; a gray, crested bird ; forehead black ; no white 

 in the tail; note, a whistled pcto^peto, or hoarse de-de-de-de\ resi- 

 dent from New York city southward . . Tufted Tit, page 250. 



c"^. Length 8-50 inches ; a white band at the end of the tail ; a con- 

 cealed orange-red crest ; a bird of the air, catching its insect food 

 on the wing, and occasionally sallying forth from its exposed perch 

 in pur.suit of a passing Crow; note, an unmusical, steely chatter; 

 May to Sept Kingbird, jiage 150. 



d. Back brown. 



(/'. Length 5-00 inches; a nervous, restless, excitable bird; tail often 

 carried erect; song sweet, rapid and rippling, delivered with aban- 

 don ; Apl. 25 to Oct House Wken, page 240. 



cA Length 12-25 inches; slim, bmwnish l)irds with long tails; flight 

 short and noiseless ; perch in a tree, not in an exposed position ; 

 note, tut-tut, cluch-cluch, and eoiv-coiv; May to Oct. 



Yellow-billed Cuckoo, Bl.\ck-billed Cuckoo, page 132. 

 B. Back brownish, streaked. 

 a. Crown rufous or chestnut without streaks. 



'/'. Length 5-25 inches; bill black; a whitish line over the eye; a 

 familiar bird of lawns and door-yai-ds ; song, a monotonous cMppy- 

 chippi/-c7iippi/; Ay)!. to 'Sow . . Chipping Sparrow, page 186. 



a^. Length 5-70 inches; bill reddixJi, broion, back rufous or rufous- 

 brown ; wing-bars and eye-ring whitish ; haunts dry, bushy fields 

 and pastures; song, a musical, plaintive cher-tvee, clier-wee, cher- 

 ivee, cheeo, dee-dee-dee-dee ; Apl. to Nov. Field Sparrow, page 182. 



a'. Length 5-90 inches; forehead black ; crown and wings chestnut- 

 rufous ; flanks pale grayish brown ; haunts marshes ; song, a rapidly 

 repeated weet-iveet-weet, etc. ; Mch. to Nov. 



Swamp Sparrow, page 180. 



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