=751a. Western Gnatcatcher= (_P. c. obscura_). Similar to No.. 751,

but slightly grayer above; white tip to next to outer tail-feather

_less_ than 1.00 long.

Range.--Western United States from western Texas west to California

and Lower California.

[Illustration: 752.]

=752. Plumbeous Gnatcatcher= (_Polioptila plumbea_). L. 4.4. Outer web

of outer tail-feather _wholly_ white, inner web black except at tip.

_Ad._ [Male]. Crown shining black, back blue-gray; underparts grayish

white. _Ad._ [Female] _and Yng_. [Male]. Similar, but no black on

head. Yng. [Female]. Back and sides with a brownish wash. _Notes._

Call, a faint mew; song, "a harsh ditty of five notes, something like

a Wren's song with notes like those of a Swallow." (Cooper.)

Range.--Mexican boundary region, from western Texas to southeastern

California and Lower California.

=753. Black-tailed Gnatcatcher= (_Polioptila californica_). L. 4.5;

T. 2.1. Similar to No. 752, but outer vane of outer tail-feather

_black_ margined with white; back darker, underparts much grayer,

flanks brownish.

Range.--Pacific coast region of southern California and northern

Lower California.

[Illustration: 734.]

=734. Bridled Titmouse= (_BA|olophus wollweberi_). L. 5.2. _Ads._ Head

crested, black and gray; throat black; hind neck with a white band

bounded by black; back olive-gray; below whitish. _Notes._

Chickadee-like but fainter. (Henshaw.)

Range.--Tableland of Mexico north to western Texas and southern

Arizona.

[Illustration: 738.]

=738. Mountain Chickadee= (_Parus gambeli_). L. 5.5. _Ads._ A white

line over the eye and a black through it; back gray; belly whitish.

_Notes._ A hoarse, _dee-dee-dee_, a two or three-noted _phe-be_

whistle exactly like that of the Chickadee and an exceedingly sweet

three-noted whistle of regular intervals, _d_, _c_, _a_.

Range.--"Mountainous portions of the western United States from the

eastern base of the Rocky Mountains to the Sierra Nevada, north to

British Columbia, Idaho, etc., and south to northern Lower

California." (A.O.U.)

[Illustration: 740.]

=740. Hudsonian Chickadee= (_Parus hudsonicus_). L. 5.2; W. 2.6.

_Ads._ Crown hair-brown, back a more yellow brown; sides of head and

neck grayish white; throat black, belly white, sides rusty. _Notes._

_Tscha-dee-dee-dee-dee_; the _dee-dee_ notes repeated with almost

incessant volubility. (Brewer.)

Range.--British America, from the west side of Hudson Bay

northwestward to the Lower Yukon.

=740a. Kowak Chickadee= (_P. h. stoneyi_). Similar to No. 740, but

larger, W. 2.7. above grayer, crown much paler.

Range.--Kowak River region, Alaska.

=740b. Columbian Chickadee= (_P. h. columbianus_). Similar to No. 740,

but grayer above, crown slaty-drab.

Range.--Rocky Mountains from Montana northward; Kenai Peninsula,

Alaska.

=--Canadian Chickadee= (_P. h. littoralis_). Similar to No. 740, but

smaller, W. 2.5, crown duller brown.

Range.--British America east and south of Hudson Bay; northern

New York, northern New England, New Brunswick, Nova Scotia.

=739. Alaskan Chickadee= (_Parus cinctus alascensis_). L. 5.2. _Ads._

Crown _brown_, back _brighter_; sides of head and neck _pure white_;

throat blackish; belly whitish, sides buffy.

Range.--"Northern Alaska and eastern Siberia." (A.O.U.)

[Illustration: 741.]

=741. Chestnut-backed Chickadee= (_Parus rufescens_). L. 4.6. _Ads._

Back and sides rusty chestnut, crown sooty brown, throat black.

_Notes._ A lisping _the-the-the-te-te_. (Kobbe.)

Range.--Pacific coast from Oregon to southern Alaska.

=741a. California Chickadee= (_P. r. neglectus_). Similar to No. 741,

but with only a tinge of rusty on flanks.

Range.--"Coast of California from Monterey County northward."

(A.O.U.)

=741b. Barlow Chickadee= (_P. r. barlowi_). Similar to No. 741a,

but with no rusty on flanks.

Range.--Vicinity of Monterey, California.

[Illustration: 735.]

=735. Black-capped Chickadee= (_Parus atricapillus_). L. 5.2; T. 2.5.

_Ads._ Cap and throat black; back gray with a brownish tinge; outer

margins of wing-coverts _grayish white_; flanks, cream buff. _Notes._

_Chickadee-dee_, liquid gurgles and chuckling notes and a sweet,

clearly whistled, _phe-be_ or _phe-be-e_.

Range.--Eastern North America; breeds from southern Illinois and

Pennsylvania north to Labrador, and south along Alleghanies to North

Carolina; migrates a short distance below its southern breeding

limits.

=735a. Long-tailed Chickadee= (_P. a. septentrionalis_). Similar to

No. 735, but tail longer, 2.7, flanks paler, white edgings broader.

Range.--Rocky Mountain region north to British Columbia; east

to Manitoba and the Plains.

=735b. Oregon Chickadee= (_P. a. occidentalis_). Similar to No. 735,

but much darker; flanks grayish.

Range.--Pacific coast from northern California to Sitka.

[Illustration: 736.]

=736. Carolina Chickadee= (_Parus carolinensis_). Similar to No. 735,

but smaller, L. 4.6; T. 2., the greater wing-coverts _not_ margined

with whitish. _Notes._ Whistle "_tswee-dee_, _twsee-dee_."

Range.--Southeastern United States north to middle New Jersey, and

southern Illinois; resident from southern New Jersey southward.

=736.a Plumbeous Chickadee= (_P. c. agilis_). Similar to No. 736,

but paler above, whiter below.

Range.--"Eastern and central Texas (Bee, Victoria, Cook, and Concho

Counties, etc.") (A.O.U.)

[Illustration: 737.]

=737. Mexican Chickadee= (_Parus sclateri_). Similar to No. 735, but

sides broadly gray like back, black more extended. _Notes._ A rapid,

vigorous double-noted whistle repeated three times, wholly unlike that

of the Chickadee.

Range.--Mountainous portions of the Mexican tableland north to

southern Arizona.

[Illustration: 630.]

=630. Black-capped Vireo= (_Vireo atricapillus_). L. 4.5. _Ad._

[Male]. Crown and cheeks shining black; lores and eye-ring white; back

olive-green; below white, sides tinged with greenish yellow; two

whitish wing-bars. _Ad._ [Female]. Similar, but black of head duller.

_Yng._ "Top and sides of head dull grayish brown; lores, orbital ring

and lower parts dull buffy white or pale buffy." (Ridgw.) _Notes._ "Of

the general character of the White-eye or _bellii_ type." (Bailey.)

Range.--Breeds in central and western Texas; north to southern Kansas;

winters in southern Mexico.

[Illustration: 727.]

=727. White-breasted Nuthatch= (_Sitta carolinensis_). L. 6. _Ad._

[Male]. Crown and foreback _bluish_ black; sides of head and neck

grayish white; tertials with _distinct_ black marks rounded at end.

_Ad._ [Female]. Similar but black of head and shoulders washed with

gray. _Notes._ Call, a nasal _yank-yank_ and conversational notes;

song, a tenor, _ha-ha-ha-ha-ha-ha_, all on the same note.

Range.--Eastern North America west to the Rocky Mountains, breeds from

the Gulf States to Minnesota and New Brunswick; resident.

=727a. Slender-billed Nuthatch= (_S. c. aculeata_). Similar to

No. 727, but head usually greenish black; black of tertials less deep

and one next to inner one usually pointed at end.

Range.--Western North America west of the Rockies: breeds from Lower

California north to British Columbia; resident.

=727b. Florida White-breasted Nuthatch= (_S. c. atkinsi_). Similar to

No. 727, but somewhat smaller, wing-coverts and tertials not tipped

with grayish; [Female] with head black as in [Male].

Range.--Florida and north along the coast to South Carolina.

=727c. Rocky Mountain Nuthatch= (_S. c. nelsoni_). Similar to

No. 727a, but larger, W. 3.7, with somewhat more white in tail and

more rusty on flanks and lower belly.

Range.--Wooded mountains of northern Chihuahua and Sonora, Arizona,

New Mexico, Colorado, and northward. (Mearns.)

=727d. St. Lucas Nuthatch= (_S. c. lagunA|_). Similar to No. 727a, but

with the wings and tail shorter, the black tips of the outer

tail-feathers more restricted; W. 3.2; T. 1.7. (Brewster.)

Range.--Higher mountains south of La Paz, Lower California.

(Brewster.)

[Illustration: 728.]

=728. Red-breasted Nuthatch= (_Sitta canadensis_). L. 4.6. _Ad._

[Male]. A stripe through the eye and crown, black; line _over_ eye

white; underparts rusty. _Ad._ [Female]. Similar, but crown gray like

back, line through the eye blackish, paler below. _Notes._ A fine,

thin, nasal, penny-trumpet like, drawled _yna-yna_.

Range.--North America, breeding from the northern portions of the

northern tier of States northward, and southward in the Alleghanies to

Virginia, in the Rocky Mountains to Colorado, and in the Sierra Nevada

in California; winters irregularly southward to the Gulf States and

Arizona.

[Illustration: 729.]

=729. Brown-headed Nuthatch= (_Sitta pusilla_). L. 4.3. _Ads._ Crown

brown; a white patch on nape; back bluish gray; below grayish white,

sometimes tinged with buff. _Yng._ Crown whitish. _Notes._ A

conversational, twittering _tnee-tnee_.

Range.--South Atlantic and Gulf States north to Delaware, accidentally

to New York and casually to Missouri.

[Illustration: 730.]

=730. Pygmy Nuthatch= (_Sitta pygmA|a_). L. 4.3. _Ads._ Crown grayish

olive; a whitish patch on nape; a dark brown line through eye; below

white tinged with buff. _Yng._ Crown gray like back. _Notes._ A

metallic, clinking clittick, clittick.,

Range.--Western North America, east to the Rocky Mountains; breeds

from Mexico to British Columbia.

=730a. White-naped Nuthatch= (_S. p. leuconucha_). Similar to No. 730,

but bill larger, crown grayer, back less bluish gray, nape patch more

conspicuous, underparts white with scarcely more than a trace of

buffy. (Ridgw.)

Range.--Lower California.

[Illustration: 444.]

=444. Kingbird= (_Tyrannus tyrannus_). L. 8.5. Tail tipped with white.

_Ads._ Above slaty, crown blacker with an orange patch. _Yng._

Similar, but no crown-patch. _Notes._ An unmusical, steely chatter.

"A soft and very pleasing song," heard only in the early morning.

(O. T. Miller.)

Range.--North America, breeds from Florida north to New Brunswick and

Manitoba, and from eastern Texas northwest to Utah, Nevada, northeast

California and western British Columbia; winters south of United

States, to Central and South America.

[Illustration: 445.]

=445. Gray Kingbird= (_Tyrannus dominicensis_). L. 9. _Ads._ No white

tip on tail; an orange crown-patch; under wing-coverts sulphur;

ear-coverts black; above gray; below white. _Notes._ A loud,

chattering, _pitA-rri_, _pitA-rri_.

Range.--West Indies, breeding north through Florida along the coast to

South Carolina; winters in Lesser Antilles, Mexico, and Central

America.

[Illustration: 701.]

=701. American Dipper; Water Ouzel= (_Cinclus mexicanus_). L. 8.

_Ads._ Slaty gray, head and neck browner. In winter more or less

tipped with whitish. _Notes._ Song, remarkably sweet and lively, in

modulation resembling somewhat that of Brown Thrasher, but less

powerful though sweeter in effect. (Ridgway.) Call, a sharp, pebbly

_cack-cack-cack_.

Range.--"The mountainous parts of central and western North America,

from the Yukon Valley and Unalaska to Guatemala; east in the United

States, to the eastern base of the Rocky mountains. Apparently

resident throughout its range." (A.O.U.)

[Illustration: 704.]

=704. Catbird= (_Galeoscoptes carolinensis_). L. 8.9. _Ads._ Slaty

gray, cap and tail black, under tail-coverts reddish chestnut.

_Notes._ Call, a whining, nasal _tchay_; song, rich, musical, and

varied.

Range.--North America; west to British Columbia and rarely Pacific

coast states; breeds from the Gulf States north to New Brunswick and

the Saskatchewan; winters from Gulf States southward.

[Illustration: 754.]

=754. Townsend Solitaire= (_Myadestes townsendii_). L. 8.5. _Ads._

Brownish gray; eye-ring, tips of outer tail-feathers, a narrow

wing-bar white; wing with a buff band showing in flight. _Notes._

Song, a rich, flowing, Grosbeak-like warbling, sung with great vigor

and freedom and often for comparatively long periods.

Range.--"Western United States, from the Plains westward to the

Pacific coast, north to British Columbia and south in winter to the

southern border of Arizona and northern Lower California; breeds from

the mountains of New Mexico, southern Arizona, and central California

northward."

[Illustration: 621.]

=621. Northern Shrike= (_Lanius borealis_). L. 10.2. Lores grayish.

_Ads._ Above bluish gray; tail black, outer feathers tipped with

white; below white, usually with wavy bars. _Yng._ Above washed with

brown; below more distinctly and more heavily barred _Notes._ Song,

not unlike that of the Brown Thrasher but more disconnected, less

loud.

Range.--North America; breeds from Labrador to Alaska; winters south,

irregularly, to Virginia, Kansas, Arizona, and California.

[Illustration: 622.]

=622. Loggerhead Shrike= (_Lanius ludovicianus_). 9. Lores black.

_Ads._ Underparts white _without_ bars; above bluish gray; rump and

upper tail-coverts little if any paler; tail black, outer feathers

tipped with white. _Yng._ Underparts, head, and rump more or less

narrowly barred. _Notes._ Call, harsh and discordant; song, a series

of guttural gurgles, squeaky whistles.

Range.--Eastern United States; breeds from Florida to Virginia; In

Mississippi Valley, northeast to western Pennsylvania, central and

northern New York, Massachusetts, western New Hampshire, Maine, and

British Columbia; migrates down Atlantic States, as well as

Mississippi Valley, and winters in southern States.

=622a. White-rumped Shrike= (_L. l. excubitorides_). Similar to No.

622, but paler above, rump and upper tail-coverts whiter; bill less

deep.

Range.--"Western North America, from eastern border of the Plains to

the Pacific, except coast of California, and from Manitoba and the

Plains of the Saskatchewan south over tablelands of Mexico."

=622b. California Shrike= (_L. l. gambeli_). Similar to No. 622, but

rump paler, breast usually with indistinct wavy bars and tinged with

brownish.

Range.--Pacific coast, from Lower California to British Columbia.

=622c. Island Shrike= (_L. l. anthonyi_). Similar to No. 622b, but

darker and smaller, W. 3.7.

Range.--Santa Barbara Islands, California.

[Illustration: 703.]

=703. Mockingbird= (_Mimus polyglottos_). L. 10.5. _Ads._ Above ashy

gray; below soiled whitish; outer tail-feathers with white;

wing-coverts narrowly tipped with white; primaries white basally.

_Notes._ Call, a harsh, kissing note; song indescribable.

Range.--Southeastern United States and Bahamas, west to northeastern

Texas; breeds north to southern New Jersey (rarely Massachusetts), and

southern Illinois; winters from Virginia and lower Mississippi Valley

southward.

=703a. Western Mockingbird= (_M. p. leucopterus_). Similar to No. 703,

but with a very slight brownish tinge below and white areas in wing

averaging larger.

Range.--Southwestern United States and northern Mexico from Indian

Territory and eastern Texas west to California.

[Illustration: 765.]

=765. Wheatear= (_Saxicola A"nanthe_). L. 6; W. 3.7. _Ad._ [Male].

Back gray, upper tail-coverts and base of tail white; below white more

or less washed with buff. _Ad._ [Female]. Browner above and below, no

black through eye. _Ads. in winter and Yng._ Similar to [Female], but

cinnamon brown above, cinnamon below.

Range.--Asia; migrating in summer to Alaska.

=765a. Greenland Wheatear= (_S. A". leucorhoa_). Similar to No. 765,

but larger, W. 4.

Range.--Western Europe; breeds in Greenland and on adjoining mainland;

rarely south to St. Lawrence; casually to Louisiana.

[Illustration: 573.]

=573. Black-throated Sparrow= (_Amphispiza bilineata_). L. 5.3._ Ads._

Throat, upper breast, and front of face black; a white stripe over eye

and another at the side of the throat; above grayish brown unstreaked;

outer web of outer tail-feather white, except at tip; at least half

an inch of tip of inner web white. _Notes._ Song, simple but sweet,

three ascending and three descending notes.

Range.--Middle and eastern Texas (except along coast?), north to

Oklahoma and western Kansas; winters from central Texas south into

northeastern Mexico.

=573a. Desert Sparrow= (_A. b. deserticola_). Similar to No. 573, but

above grayer, the white tip to outer tail-feather _less_ than half an

inch long.

Range.--Western United States and northern Mexico, from western Texas

to southeastern California; breeds north to southern Colorado, and

western Nevada; winters south into Mexico.

[Illustration: 602.]

=602. Morellet Seed-eater= (_Sporophila morelleti_). L. 4.6. _Ad._

[Male]. Entire upperparts, cheeks, tail, wings and breast-band black;

bases of wing-feathers, tips to coverts and underparts, except

breast-band, whitish. _Ad._ [Female]. Above grayish brown, below

uniform buffy. _Yng._ [Male]. Variously intermediate between Ad.

[Male] and Ad. [Female]. At least two years evidently required to

reach mature plumage.

Range.--Eastern Mexico, north to southeastern Texas.

[Illustration: 636.]

=636. Black and White Warbler= (_Mniotilta varia_). L. 5.3. _Ad._

[Male]. Above streaked black and white; throat black or white; belly

white; sides streaked black and white. _Ad._ [Female]. Less black;

whiter below; throat always white. _Notes._ Song, a thin, wiry,

_see-see-see-see_.

Range.--Eastern North America; breeds from Virginia, Louisiana, and

northern Texas, north to Hudson Bay region; winters from Gulf States

south to northern South America; accidental in California.

[Illustration: 661.]

=661. Black-poll Warbler= (_Dendroica striata_). L. 5.6. _Ad._ [Male].

Crown black, cheeks white; back streaked, gray and black; below white

streaked with black; wing-bars and tail-spots white. _Ad._ [Female].

No black cap; above olive-green streaked with black. _Yng. and Ad. in

winter._ Above olive-green lightly streaked with black; below

_yellowish_ white; breast obscurely streaked. _Notes._ Song, a

slender, wiry _tree-tree-tree-tree-tree-tree-tree-tree_, rapidly

uttered. (Langille.)

Range.--Eastern North America, west to the Rockies; breeds from

northern New England, northern New York, northern Michigan, and

Colorado, north to Labrador and Alaska; winters in West Indies and

northern South America.

[Illustration: 665.]

=665. Black-throated Gray Warbler= (_Dendroica nigrescens_). L. 5.

_Ad._ [Male]. Crown, cheeks and throat black, a white stripe at sides

of throat, a yellow line before eye; back gray streaked with black;

wing-bars and tail-patches white. _Ad._ [Female]. Similar, but crown

not always wholly black. _Yng._ Above washed with brownish, black

areas tipped with white. _Notes._ Song, _zee-ee-zee-ee_, _ze_, _ze_,

_ze_, with the quality of the song of _Dendroica virens_ or

_D. cA|rulescens_.

Range.--Western United States; breeds in mountains from Arizona and

northern Lower California, north to Colorado and Vancouver Island;

winters in Mexico.

[Illustration: 611.]

=611. Purple Martin= (_Progne subis_). L. 7.8. _Ad._ [Male]. Shining

blue-black, all feathers with dusky bases. _Ad._ [Female]. Above dull

blue-black; breast grayish edged with white; belly whitish. _Yng._

[Male]. Variously intermediate between [Female] and Ad. [Male].

Range.--North America, except Pacific coast; breeds north to

Newfoundland and the Saskatchewan; winters in tropics.

=611a. Western Martin= (_P. s. hesperia_). [Male] similar to [Male]

of No. 611; [Female] belly whiter; forehead grayish.

Range.--Pacific coast from northern Lower California to Washington

(and British Columbia?); winters in tropics.

=611.1. Cuban Martin= (_Progne cryptoleuca_). W. 5.50. _Ad._ [Male].

With feathers of ventral region basally marked with white. _Ad._

[Female] _and Yng_. [Male]. With breast and flanks sooty grayish

brown, belly _pure white_.

Range.--Cuba, north in spring to southern Florida.

[Illustration: 612.]

=612. Cliff Swallow= (_Petrochelidon lunifrons_). L. 5.5. _Ads._

Throat chestnut, forehead and rump cinnamon-buff; nape gray; crown and

back glossy blue-black, the back streaked with white. _Yng._ Throat

dusky, often mixed with chestnut; back blackish brown; rump

cinnamon-buff, forehead usually with same.

Range.--"North America, north to the limit of trees, breeding south to

the valleys of the Potomac and Ohio, southern Texas, southern Arizona,

and California; Central and South America in winter; not recorded from

Florida or West Indies." (A.O.U.)

=612.2. Mexican Cliff Swallow= (_Petrochelidon melanogastra_). Similar

to No. 612, but smaller, W. 4.1, forehead deeper, usually chestnut,

like throat, rump darker, more rusty.

Range.--Mexico, north to southern Arizona.

[Illustration: 613.]

=613. Barn Swallow= (_Hirundo erythrogastra_). L. [Male], 7.5;

[Female], 6.5. Tail deeply forked. _Ad._ [Male]. Above glossy

blue-black, forehead chestnut; throat and upper breast chestnut, belly

paler. _Ad._ [Female]. Forehead, and underparts paler; tail less

deeply forked. _Notes._ Song, a sweet, twittering, warbling song. (The

notes of all our Swallows, while simple, are diagnostic but difficult

of description.)

Range.--North America, north to Greenland and Alaska; breeds through

most of range; winters south to southern Brazil.

[Illustration: 614.]

=614. Tree Swallow= (_Iridoprocne bicolor_). L. 6. _Ads._ Above

steel-blue or steel-green; below white. _Yng._ Sooty gray above; white

below.

Range.--North America; breeds locally from Lat. 41A deg. on Atlantic coast

and Lat. 38A deg. on Pacific coast north to Labrador and Alaska; winters

from South Carolina and southern California to the tropics.

[Illustration: 615.]

=615. Northern Violet-Green Swallow= (_Tachycineta thalassina

lepida_). L. 5.2; W. 4.5. _Ad._ [Male]. Above bronze-green; upper

tail-coverts greener; an indistinct nape-ring; mark above eye, cheeks

and underparts white; flank-patches white, often showing from above.

_Ad._ [Female]. Much duller, the head browner, _Yng._ Above brownish

sooty with a greenish tinge; a whitish mark above and behind eye;

below white.

Range.--Western United States, from eastern base of Rockies to

Pacific; breeds from Mexico north to British Columbia; winters in

Mexico and Central America.

=615a. St. Lucas Swallow= (_T. t. brachyptera_). Similar to No. 615,

but wing shorter, [Male], 4.1, [Female], 4. (Brewster.)

Range.--Lower California.

[Illustration: 458.]

=458. Black PhA"be= (_Sayornis nigricans_). L. 7.2. _Ads._ Breast and

head black, back grayer; outer web of outer tail-feather white; belly

black, under tail-coverts white _streaked with dusky_. _Notes._ A

liquid _hip_, a rising _kee-ree_, and a falling _kee-wray_. (Bailey.)

Range.--Mexico, except Yucatan and Pacific coast from Colima

northward, north into Texas, New Mexico, and southeastern Arizona.

=458a. Western Black PhA"be= (_S. n. semiatra_). Similar to No. 458,

but under tail-coverts white without dusky streaks.

Range--Pacific coast of Mexico and United States, from Colima to

Oregon, including most of Arizona. (Nelson.)

[Illustration: 494.]

=494. Bobolink; Reed bird= (_Dolichonyx oryzivorus_). _Ad._ [Male],

_summer_. Black; nape buffy, lower back, scapulars and upper

tail-coverts white. _Ad._ [Female]. Above yellowish brown streaked

with buff, and black. below yellowish white, sides streaked with

black. _Winter plumage, Ads and Yng._ Like [Female] but yellower.

_Notes._ Song, an irrepressible bubbling outburst of "mad music" often

given on the wing; calls, a blackbird-like _chuck_ and a metallic, far

carrying, _chink_.

Range.--Eastern North America, west to Utah; breeds from northern New

Jersey, Illinois and Kansas, north to Nova Scotia, Manitoba, and

Montana; migrates south through Florida and West Indies, and winters

south of Amazon.

[Illustration: 534 Winter.]

[Illustration: 534 Summer.]

Color Key to North American Birds with bibliographical appendix · 第 23 / 34 段