FIELD KEY 135 
II, No red on the underparts. 
A. Length 9°00; black; shoulders red; haunts marshes; migrates in flocks. 
498. Rep-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. Reppout (Im.). 
C. Length 4°00; underparts whitish; back olive-green; a ruby crown- 
patch; eye-ring white; movements restless, wings flitted nervously; 
ceall-note, cack; song remarkably loud and musical; Sept. and Oct.; 
Apl. and May . eh wf WS ares TAOS 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. InpIco BuNnrTING. 
Fourth Group.—Plumage conspicuously black, or black 
and white 
I. Black and white birds. 
A. Throat black. 
a. Length over 6°00. 
at, Entire underparts black; nape buffy; rump white; a musical 
dweller of fields and meadows; frequently sings on the wing. 
94. BoBOLINK. 
a’, Breast rose-red; rest of the plumage black and white; song rapid, 
loud, and musical; call-note, peek; a tree dweller in rather open 
Woddlatid «4c. ue ae a xo 595. RosE-BREASTED GROSBEAK. 
a’, Sides rufous; rest of the plumage black and white; call-note, 
chewink or towhee; inhabits the undergrowth . . 587. TowHEEz. 
b. Length under 6°00. 
61. Crown black; cheeks white; back ashy; unstreaked; call, chick-a- 
dee, or a musical, double-noted whistle ... 735. CHICKADEE, 
b2. Conspicuously streaked with black and white; a tree creeper. 
636. Buack 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. Kincsirp. 
b. Length 5°75; crown black; back bivish gray; a tree creeper: call-note, 
yank, yank ee 727, WHITE-BREASTED NUTHATCH. 
c. Length 6°50; upper parts washed with rusty; eg: seen in flocks; 
terrestrial; Nov—Mch. ...-..-.e++68- . Snow Buntine 
II. No white in the plumage. 
A. Length 19°00; jet-black «2, se wea ec cee ean 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. Purpue GRacKLE. 511b. Bronzep GRACKLE. 
C. Length 9°50; shoulders red; haunts marshes; call, kong-quér-réé. 
498. Rep-wINcep BLACKBIRD. 
D. Length 7°50; head and neck coffee-brown; fearon seen on the 
ground nearcattle...... este ee eee 495. CowBIRD. 
