FIELD KEY TO COMMON BIRDS. 81 



a*. Length 5*75 inches; a white line over Che eye nol bordered by 

 black ; prefers the upper branches of rows of elms and other shade 

 trees; Bong, a rich, unbroken warble with an alto undertone; May 

 to Sept Wabbling Vireo, page \,-,: K 



a 3 . 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 twitched nervously; note, 

 cufk; Bang, a remarkably loud, musical whistle; Sept. and Oct.; 



Apl. and May Ruby-crowned Kinglet, page 182. 



6. 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. 



b 1 . Length 7-00 inches; frequently found nesting under bridges or 

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

 pee, pee, and pt wU-phabi : Mch. to Oct . . . Phojbe, page 124. 



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

 pee-a-wee; May to Sept Wood Pe wee, page 126. 



b 3 . Length 5*40 inches; haunts orchards, lawns, and open woodlands; 

 note, chebec, chebec Least Fltcatohkb, page 125. 



c. Back gray or bluish gray. 



c 1 . Length 6-50 inches ; a gray, crested bird ; forehead black ; no white 

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

 dent from New York city southward . . Tufted Tit, page 180. 



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 pursuit of a passing Crow; note, an unmusical, steely chatter; 

 May to Sept Kinqbibd, page 122. 



d. Back brown. 



d 1 . 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 When, page 175. 



ip. 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 cow-cow ; May to Oct. 



Yellow-billed Cuckoo, Blackbilled Cuckoo, pages 112, 113. 

 B. Back brownish, streaked. 

 a. Crown rufous or chestnut without streaks. 



a 1 . Length 5-25 inches; bill black; a whitish line over the eye; a 

 familiar bird of lawns and door-yards; Bong, a monotonous chippy- 

 eMppy-ohippy, Apl. to Nov. . . Chipping Sparrow, page 142. 

 a 1 . Length 5*70 inches; bill reddish brown, back rufous or rufous- 

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

 and pastures; Bong, a musical, plaintive chsr-toee, eher-wee, cher- 

 wee,cheeo, dee-dee-dee-dee \ Apl. to Nov. Field Sparrow, page 140. 

 a*. Length 5*90 inches; forehead black; crown and wings ch 



rufous; thinks pale grayish brown ; haunts marshes ; soiil.'. a rapidly 

 repeated Wtet-Weet-Wt • t, etc.; Mch. to Nov. 



Swamt Bpabbow, page 139. 

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