FIELD KEY 135 



II. No red on the underparts. 



A. Length 9'00; black; shoulders red; haunts marshes; migrates in flocks. 



498. RED-WINGED BLACKBIRD. 



B. Length 5*25; crown-cap red; chin black; rest of underparts streaked 



with blackish; feeds on seeds and catkins; Nov. to Mch. 



528. REDPOLL (Im.). 



C. Length 4' 00; underparts whitish; back olive-green; a ruby crown- 



patch; eye-ring white; movements restless, wings flitted nervously; 

 call-note, cack; song remarkably loud and musical ; Sept. and Oct. ; 

 Apl. and May 749. RUBY-CROWNED KINGLET. 



Third Group. With blue in the plumage 



A. Length 11 '50; a conspicuous crest; upperparts dull blue; underparts 



whitish; a black patch on the breast 477. BLUE JAY. 



B. Length 7'00; upperparts bright blue; breast cinnamon-rufous. 



766. BLUEBIRD. 



C. Length 5*50; entire plumage indigo-blue. .598. INDIGO BUNTING. 



Fourth Group. Plumage conspicuously black, or black 

 and white 



I. Rteck and white birds. 



A. Throat black. 



a. Length over 6 '00. 



a 1 . Entire underparts black; nape buffy; rump white; a musical 

 dweller of fields and meadows; frequently sings on the wing. 



494. BOBOLINK. 



a 2 . Breast rose-red; rest of the plumage black and white; song rapid, 

 loud, and musical; call-note, p&ek; a tree dweller in rather open 

 woodland 595. ROSE-BREASTED GROSBEAK. 



a 3 . Sides rufous; rest of the plumage black and white; call-note, 

 chewink or towhee; inhabits the undergrowth . . 587. TOWHEE. 



b. Length under 6*00. 



6 1 . Crown black; cheeks white; back ashy; unstreaked; call, chick-a- 

 dee, or a musical, double-noted whistle . . . 735. CHICKADEE. 

 b 2 . Conspicuously streaked with black and white; a tree creeper. 



636. BLACK AND WHITE WARBLER. 



B. Underparts white or whitish. 



a. Length 8*00; upperparts grayish slate-color; tail tipped with white; 

 a bird of the air, catching its insect food on the wing, and occasion- 

 ally sallying forth from its exposed perch in pursuit of a passing 

 Crow; note, an unmusical, steely chatter . . . 444. KINGBIRD. 



6. Length 5' 75; crown black; back bluish gray; a tree creeper; call-note, 

 yank, yank 727. WHITE-BREASTED NUTHATCH. 



c. Length 6*50; upper parts washed with rusty; generally seen in flocks; 



terrestrial; Nov.-Mch. . . , 534. SNOW BUNTING 



II. No white in the plumage. 



A. Length 19'00; jet-black . . 488. AM. CROW. 



B. Length 12'00; black with metallic reflections; iris yellowish; migrates 



in flocks; nests usually in colonies in coniferous trees; voice cracked 

 and reedy; tail "keeled" in short flights; a walker. 



511. PURPLE GRACKLE. 5116. BRONZED GRACKLE. 



C. Length 9*50; shoulders red; haunts marshes; call, kong-quer-ree. 



498. RED-WINGED BLACKBIRD. 



D. Length 7'50; head and neck coffee-brown; frequently seen on the 



ground near cattle 495. COWBIRD. 



