CHECK-LIST OF COLORADO BIRDS
The following list includes all the species and varieties, so far as
known to naturalists, occurring in the State of Colorado. Of course,
these birds as families are not restricted to that State, and therefore
the catalogue comprehends many of the species to be found in adjacent
and even more remote parts of the country. Aside from the author's own
observations, he is indebted for a large part of the matter comprised in
this list to Professor Wells W. Cooke's pamphlet, entitled, "The Birds
of Colorado," with the several appendixes, and to the invaluable manuals
of Mr. Ridgway and Dr. Coues.
According to the latest information accessible to the writer, 389
species and varieties occur in Colorado, of which 243 are known to
breed. This is a superb record, and is excelled by only two other States
in the Union, namely, Texas and California. Colorado's splendid list is
to be explained on the ground of its wonderful variety of climate,
altitude, soil, and topographical features, such as its plains,
foothills, lower mountains, and towering peaks and ranges, bringing
within its boundaries many eastern, boreal, middle western, and far
western forms.
The author's preference would have been to begin the roll with the most
interesting birds, those to which he gave the largest share of his
attention, namely, the oscines, but he has decided to follow the order
and nomenclature of the Check-List of North American birds as arranged
by the American Ornithologists' Union. In deference to the general
reader, however, he has placed the English name of each bird first, then
the scientific designation. The numbers correspond to the American
Check-List. By noting those omitted, the reader will readily discover
what species have not been found in Colorado.
1. Western grebe. Æchmophorus occidentalis. Rare migrant; western
species, chiefly interior regions of North America.
2. Holboell's grebe. Colymbus holboellii. Rare migrant; breeds far
north; range, all of North America.
3. Horned grebe. Colymbus auritus. Rare migrant; range, almost the same
as the last.
4. American eared grebe. Colymbus nigricollis californicus. Summer
resident; rare in eastern, common in western Colorado; breeds from
plains to 8,000 feet; partial to alkali lakes; western species.
6. Pied-billed grebe. Podilymbus podiceps. Summer resident, rare; common
in migration; breeds in northern part of State; sometimes winters in
southern part.
7. Loon. Gavia imber. Migrant; occasionally winter resident; not known
to breed in State.
8. Yellow-billed loon. Gavia adamsii. Migrant; rare or accidental.
9. Black-throated loon. Gavia arctica. Rare fall and winter visitant.
37. Parasitic jaeger. Stercorarius parasiticus. Fall and winter
resident; rare.
40. Kittiwake. Rissa tridactyla. Rare or accidental in winter.
49. Western gull. Larus occidentalis. Pacific Coast bird; accidental in
Colorado; only one record.
51a. American herring gull. Larus argentatus smithsonianus. Rare
migrant; range, the whole of North America.
53. California gull. Larus californicus. Western species; breeds
abundantly in Utah; only three records for Colorado.
54. Ring-billed gull. Larus delawarensis. Not uncommon summer resident;
common in migration; breeds as high as 7,500 feet; range, whole of North
America.
58. Laughing gull. Larus atricilla. Bird of South Atlantic and Gulf
States; once accidental in Colorado.
59. Franklin's gull. Larus franklinii. Rare migrant; range, interior of
North America.
60. Bonaparte's gull. Larus philadelphia. Rare migrant; not uncommon in
a few localities; range, whole of North America.
62. Sabine's gull. Xema sabinii. Rare winter visitant; breeds in the
arctic regions.
69. Forster's tern. Sterna forsteri. Rare summer resident; common
migrant; habitat, temperate North America.
71. Arctic tern. Sterna paradisæa. Very rare migrant; but two records;
breeding habitat, circumpolar regions.
77. Black tern. Hydrochelidon nigra surinamensis. Common summer
resident; both sides of range; habitat, temperate North America; in
winter south as far as Brazil and Chili.
120. Double-crested cormorant. Phalacrocorax dilophus. Perhaps breeds in
Colorado, as it breeds abundantly in Utah; all present records from
eastern foothills.
125. American white pelican. Pelecanus erythrorhynchos. Once a common
migrant; a few remained to breed; now rare; still noted on both sides of
the range.
129. American merganser. Merganser americanus. Resident; common migrant
and winter sojourner; a few breed in mountains and parks; generally
distributed in North America.
130. Red-breasted merganser. Merganser serrator. Rare winter sojourner;
common migrant; breeds far north.
131. Hooded merganser. Lophodytes cucullatus. Rare resident both summer
and winter; breeds in eastern part and in the mountains; general range,
North America.
132. Mallard. Anas boschas. Very common in migration; common in winter;
breeds below 9,000 feet, on plains as well as in mountains; general
range, whole northern hemisphere.
134a. Mottled duck. Anas fulvigula maculosa. Rare migrant; an eastern
species, sometimes wandering west to plains.
135. Gadwall. Chaulelasmus streperus. Summer resident; common in
migration; breeds on plains; also in sloughs and small lakes at an
elevation of 11,000 feet in southern part of State; breeds abundantly at
San Luis Lakes.
137. Baldpate. Mareca americana. Summer resident; breeds from plains to
8,000 feet.
139. Green-winged teal. Nettion carolinensis. Common summer resident;
abundant in migration; a few breed on the plains; more in mountains and
upper parks.
140. Blue-winged teal. Querquedula discors. Same records as preceding.
141. Cinnamon teal. Querquedula cyanoptera. Common summer resident;
breeds both east and west of the range; a western species; in winter
south to Chili, Argentina, and Falkland Islands; sometimes strays east
as far as Illinois and Louisiana.
142. Shoveller. Spatula clypeata. Summer resident; abundant in
migration; breeds in suitable localities, but prefers mountain parks
8,000 feet in altitude; breeds throughout its range, which is the whole
of North America.
143. Pintail. Dafila acuta. Rare summer and winter resident; common
migrant; mostly breeds in the North.
144. Wood duck. Aix sponsa. Rare summer resident.
146. Redhead. Aythya americana. Common migrant; breeds far north;
migrates early in spring.
147. Canvas-back. Aythya vallisneria. Migrant; not common; breeds far
north.
148. Scaup duck. Aythya marila. Rare migrant; both sides of the range;
breeds far north.
149. Lesser scaup duck. Aythya affinis. Migrant; not common; a little
more common than preceding.
150. Ring-necked duck. Aythya collaris. Rare migrant, though common in
Kansas; breeds in far North.
151. American golden-eye. Clangula clangula americana. Rare migrant;
breeds far north.
152. Barrow's golden-eye. Clangula islandica. Summer and winter
resident; a northern species, but breeds in mountains of Colorado,
sometimes as high as 10,000 feet; rare on plains.
153. Buffle-head. Charitonetta albeola. Common migrant throughout State;
breeds in the North.
154. Old squaw. Harelda hyemalis. Rare winter visitor; a northern
species.
155. Harlequin duck. Histrionicus histrionicus. Resident; not common; a
northern species, but a few breed in mountains at an altitude of 7,000
to 10,000 feet.
160. American eider. Somateria dresseri. Very rare; only two
records—one somewhat uncertain.
163. American scoter. Oidemia americana. Rare winter visitor; northern
bird, in winter principally along the sea-coast, but a few visit the
larger inland lakes.
165. White-winged scoter. Oidemia deglandi. Same habits as preceding;
perhaps rarer.
166. Surf scoter. Oidemia perspicillata. Same as preceding.
167. Ruddy duck. Erismatura jamaicensis. Common summer resident; both
sides of the range; breeds from plains to 10,000 feet; a beautiful bird;
author's observations given in Chapter VII.
169. Lesser snow goose. Chen hyperborea. Migrant and winter resident;
not common; breeds far north.
169a. Greater snow goose. Chen hyperborea nivalis. Rare migrant; only
two records; the eastern form, which does not come regularly as far west
as Colorado.
171a. American white-fronted goose. Anser albifrons gambeli. Rare
migrant; breeds far northward.
172. Canada goose. Branta canadensis. Summer and winter resident; rare,
except locally; common in migration; breeds about secluded lakes at
10,000 feet.
172a. Hutchins's goose. Branta canadensis hutchinsii. Common migrant;
breeds in the North; a few may winter in the State.
172c. Cackling goose. Branta canadensis minima. One record; Pacific
coast bird; breeds in Alaska.
173. Brant. Branta bernicla. Rare or accidental migrant; an eastern
species seldom coming west; breeds only within the Arctic Circle.
180. Whistling swan. Olor columbianus. Migrant; not common; formerly
fairly plentiful; breeds far northward.
181. Trumpeter swan. Olor buccinator. Rare migrant; not so common as
preceding; breeds from Iowa and Dakota northward.
183. Roseate spoonbill. Ajaja ajaja. Accidental; two instances; habitat,
tropical and subtropical America.
184. White ibis. Guara alba. Rare migrant; one taken on plains; habitat,
tropical and subtropical America, coming north as far as Great Salt Lake
and South Dakota.
[185.] Scarlet ibis. Guara rubra. Accidental; one specimen taken; a
wonderful record for this tropical species.
186. Glossy ibis. Plegadis autumnalis. Accidental; two fine specimens
taken in the State; this is far out of its ordinary tropical range.
187. White-faced glossy ibis. Plegadis guarauna. Summer visitor; rare;
fairly common in New Mexico and Arizona; sometimes wanders into
Colorado; Aiken found it breeding at San Luis Lakes.
188. Wood ibis. Tantalus loculator. Rare summer visitor; southern range.
190. American bittern. Botaurus lentiginosus. Common summer resident;
breeds throughout the State, from plains to about 7,000 feet.
191. Least bittern. Ardetta exilis. Rare summer visitor; a few records
east of mountains; one specimen seen west of the divide.
194. Great blue heron. Ardea herodias. Summer resident; common in
migration; seldom goes far up in the mountains, though Mr. Aiken found
one at an altitude of 9,000 feet.
196. American egret. Ardea egretta. Rare or accidental; one seen;
general range, the whole of the United States; in winter south to Chili
and Patagonia.
197. Snowy heron. Ardea candidissima. Summer visitor; not known to
breed; the highest altitude is the one taken near Leadville, 10,000
feet.
198. Reddish egret. Ardea rufescens. Rare or accidental; only two
specimens secured; southern range.
202. Black-crowned night heron. Nycticorax nycticorax nævius. Summer
resident; not common; local; more plentiful in migration.
203. Yellow-crowned night heron. Nycticorax violaceus. Rare summer
visitor; southern species; not known to breed in State.
204. Whooping crane. Grus americana. Rare migrant; more common east of
Colorado.
205. Little brown crane. Grus canadensis. Migrant; few taken; northern
breeder.
206. Sandhill crane. Grus mexicana. Summer resident; not uncommon
locally; in migration common; breeds as high as 8,000 feet; has been
seen in autumn passing over the highest peaks.
212. Virginia rail. Rallus virginianus. Summer resident; not uncommon;
breeds on plains and in mountains to at least 7,500 feet.
214. Sora. Porzana carolina. Common summer resident; breeds from plains
to 9,000 feet.
216. Black rail. Porzana jamaicensis. Rare migrant; one specimen
secured.
219. Florida gallinule. Gallinula galeata. Summer visitor, not known to
breed.
221. American coot. Fulica americana. Common summer resident; breeds on
plains and in mountain parks.
222. Red phalarope. Crymophilus fulicarius. Migrant; rare; once taken at
Loveland by Edw. A. Preble, July 25, 1895. Breeds far north.
223. Northern phalarope. Phalaropus lobatus. Migrant; not uncommon;
breeds far northward.
224. Wilson's phalarope. Steganopus tricolor. Common summer resident;
more common in migration; breeds below 6,000 feet.
225. American avocet. Recurvirostra americana. Common summer resident;
occurs frequently on the plains; less frequent in mountains.
226. Black-necked stilt. Himantopus mexicanus. Summer resident; most
common in the mountains, going as high as 8,000 feet; more common west
of range than east.
228. American woodcock. Philohela minor. Rare summer resident; Colorado
the extreme western limit of its range, going only to foothills.
230. Wilson's snipe. Gallinago delicata. Rare summer resident; common
migrant; winter resident, rare; found as high as 10,000 feet.
232. Long-billed dowitcher. Macrorhamphus scolopaceus. Somewhat common
migrant; all records restricted to plains; breeds far northward.
233. Stilt sandpiper. Micropalama himantopus. Rare migrant; breeds north
of United States.
239. Pectoral sandpiper. Tringa maculta. Common migrant; occurs from the
plains to the great height of 13,000 feet.
240. White-rumped sandpiper. Tringa fuscicollis. Not uncommon migrant; a
bird of the plains, its western limit being the base of the Rockies;
breeds in the far North.
241. Baird's sandpiper. Tringa bairdii. Abundant migrant; breeds far
north; returns in August and ranges over mountains sometimes at height
of 13,000 to 14,000 feet, feeding on grasshoppers.
242. Least sandpiper. Tringa minutilla. Common migrant; found from
plains to 7,000 feet.
243a. Red-backed sandpiper. Tringa alpina pacifica. Rare migrant; only
three records; range, throughout North America.
246. Semipalmated sandpiper. Ereunetes pusillus. Common migrant; from
the plains to 8,000 feet.
247. Western sandpiper. Ereunetes occidentalis. Rare migrant; breeds in
the remote North; western species, but in migration occurs regularly
along the Atlantic coast.
248. Sanderling. Calidris arenaria. Rare migrant, on plains; range
nearly cosmopolitan; breeds only in northern part of northern
hemisphere.
249. Marbled godwit. Limosa fedoa. Migrant; not common; a bird of the
plains, but seldom seen; occasionally found in the mountains.
254. Greater yellow-legs. Totanus melanoleucus. Common migrant; in
favorable localities below 8,000 feet.
255. Yellow-legs. Totanus flavipes. Common migrant; distribution same as
preceding.
256. Solitary sandpiper. Helodromas solitarius. Summer resident; not
common; in migration, common; breeds from plains to 10,000 feet.
258a. Western willet. Symphemia semipalmata inornata. Summer resident;
not common; common migrant, especially in the fall; breeds from plains
to 7,000 feet.
261. Bartramian sandpiper. Bartramia longicauda. Common summer resident;
abundant in migration; a bird of the plains; rare west of mountains.
263. Spotted sandpiper. Actitis macularia. Abundant summer resident;
breeds on the plains and at all intermediate altitudes to 12,000 feet,
even on top of mountains of that height, if a lake or pond can be found;
in fall, ranges above timber-line to 14,000 feet; some may remain
throughout winter.
264. Long-billed curlew. Numenius longirostris. Common summer resident;
breeds on the plains; also in Middle and South Parks; found on both
sides of the range.
265. Hudsonian curlew. Numenius hudsonicus. Rare migrant; all records
thus far from the plains; general range, North America.
270. Black-bellied plover. Squatarola squatarola. Migrant, not common;
bird of plains below 5,000 feet; breeds far north.
272. American golden plover. Charadrius dominicus. Migrant, not common;
same record as preceding.
273. Killdeer. Ægialitis vocifera. Abundant summer resident; arrives
early in spring; breeds most abundantly on plains and at base of
foothills, but is far from rare at an altitude of 10,000 feet.
274. Semipalmated plover. Ægialitis semipalmata. Migrant, not common;
breeds near the Arctic Circle.
281. Mountain plover. Ægialitis montana. Common summer resident; in
spite of its name, a bird of the plains rather than the mountains; yet
sometimes found in parks at an altitude of 8,000 and even 9,000 feet.
Its numbers may be estimated from the fact that in one day of August a
sportsman shot one hundred and twenty-six birds, though why he should
indulge in such wholesale slaughter the author does not understand.
283. Turnstone. Arenaria interpres. Rare migrant; breeding grounds in
the north; cosmopolitan in range, but chiefly along sea-coasts.
289. Bob-white. Colinus virginianus. Resident; somewhat common locally;
good reason to believe that all the quails of the foothills are
descendants of introduced birds, while those of the eastern border of
the plains are native. A few were introduced some years ago into Estes
Park, and are still occasionally noticed.
293. Scaled partridge. Callipepla squamata. Resident; common locally;
southern species, but more common than the bob-white at Rocky Ford, Col.
294. California partridge. Lophortyx californicus. Resident, local;
introduced at Grand Junction, Col., and have flourished so abundantly as
to become troublesome to gardeners.
295. Gambel's partridge. Lophortyx gambelii. Resident, rare; known only
in southwestern part of the State; a western species.
297. Dusky grouse. Dendragapus obscurus. Resident; mountain dwellers;
breed from 7,000 feet to timber-line; in September wander above
timber-line to 12,500 feet, feeding on grasshoppers; remain in thick
woods in winter.
300b. Gray ruffed grouse. Bonasa umbellus umbelloides. Rare resident; a
more northern species, but a few breed in Colorado just below
timber-line; winters in higher foothills.
304. White-tailed ptarmigan. Lagopus leucurus. Common resident; one of
the most strictly alpine species; breeds entirely above timber-line from
11,500 to 13,500 feet; thence ranging to the summits of the highest
peaks. Only in severest winter weather do they come down to timber-line;
rarely to 8,000 feet. In winter they are white; in summer fulvous or
dull grayish-buff, barred and spotted with black. This bird is
colloquially called the "mountain quail." The brown-capped leucosticte
is the only other Colorado species that has so high a range.
305. Prairie hen. Tympanuchus americanus. Resident; uncommon and local.
308b. Prairie sharp-tailed grouse. Pediœcetes phasianellus
campestris. Resident, not common; once common, but killed and driven out
by pothunters; some breed in Middle Park; noted in winter at 9,500 feet.
309. Sage grouse. Centrocercus urophasianus. Common resident. "As its
name implies, it is an inhabitant of the artemisia or sage-brush plains,
and is scarcely found elsewhere." Ranges from plains to 9,500 feet.
310. Mexican turkey. Meleagris gallopavo. Rare local resident; southern
part of the State.
310a. Wild turkey. Meleagris gallopavo fera. Resident; rare; once
abundant, but will probably soon be exterminated; not certain whether
Colorado birds are eastern or western forms.
312. Band-tailed pigeon. Columba fasciata. Summer resident; local;
breeds from 5,000 to 7,000 feet and occasionally higher.
316. Mourning dove. Zenaidura macroura. Summer resident; very abundant;
breeds everywhere below the pine region up to 10,000 feet, though
usually a little lower; in fall ranges up to 12,000 feet.
319. White-winged dove. Melopelia leucoptera. Four records of this
straggler in Colorado; its usual range is subtropical, though not
uncommon as far north as the southern border of the United States.
325. Turkey vulture. Cathartes aura. Common summer resident; breeds from
plains to 10,000 and even 12,000 feet.
327. Swallow-tailed kite. Elanoides forficatus. Summer visitor; rare or
accidental; bird of the plains, not regularly west of central Kansas.
329. Mississippi kite. Ictinia mississippiensis. Accidental; two
records; a bird of eastern and southern United States, and southward.
331. Marsh hawk. Circus hudsonius. Common resident; most common in
migration; a few remain throughout winter; breeds on plains, and in
mountains to 10,000 feet; in fall may be seen at 14,000 feet.
332. Sharp-shinned hawk. Accipiter velox. Common resident; much more
common in mountains than on plains; breeds up to 10,000 feet.
333. Cooper's hawk. Accipiter cooperi. Common resident; breeds from
plains to 9,000 feet.
334. American goshawk. Accipiter atricapillus. Resident; not uncommon;
breeds from 9,000 to 10,000 feet; more common in winter than summer.
334a. Western goshawk. Accipiter atricapillus striatulus. Winter
visitor; rare, if not accidental; Pacific Coast form; comes regularly as
far east as Idaho.
337a. Krider's hawk. Buteo borealis kriderii. Resident; not uncommon;
nests on the plains; no certain record for the mountains.
337b. Western red-tail. Buteo borealis calurus. Abundant resident; this
is the Rocky Mountain form, of which Krider's hawk is the eastern
analogue; the ranges of the two forms overlap on the Colorado plains;
calurus breeds from plains to 12,000 feet; not a few winter in the
State.
337d. Harlan's hawk. Buteo borealis harlani. Rare winter visitor; one
specimen; natural habitat, Gulf States and lower Mississippi Valley.
339b. Red-bellied hawk. Buteo lineatus elegans. Rare migrant; Pacific
coast species.
342. Swainson's hawk. Buteo swainsoni. Common resident; breeds
everywhere below 11,000 feet.
347a. American rough-legged hawk. Archibuteo lagopus sancti-johannis.
Somewhat common winter resident; arrives from the north in November and
remains till March.
348. Ferruginous rough-leg. Archibuteo ferrugineus. Rather common
resident; breeds on plains and in mountains; winters mostly on plains
and along lower streams.
349. Golden eagle. Aquila chrysaetos. Resident; common in favorable
localities; breeds from foothills to 12,500 feet; in winter on plains
and also in mountains, often at 11,000 feet.
352. Bald eagle. Hallæetus leucocephalus. Fairly common resident; mostly
in mountains in summer; on plains in winter.
355. Prairie falcon. Falco mexicanus. Not uncommon resident; breeds from
plains to 10,000 feet; quite numerous in more open portions of western
Colorado.
356. Duck hawk. Falco peregrinus anatum. Resident; not uncommon locally;
breeds up to 10,000 feet.
357. Pigeon hawk. Falco columbarius. Summer resident; not common; usual
breeding grounds 8,000 to 9,000 feet; some breed on the plains.
358. Richardson's merlin. Falco richardsonii. Rare summer resident; not
uncommon in migration; naturalists not quite sure that it breeds in the
State; has been taken in summer at an altitude of 11,000 feet.
360. American sparrow hawk. Falco sparverius. Abundant resident; the
most common hawk from the plains to 11,000 feet; some winter in State;
breeds throughout its range.
360a. Desert sparrow hawk. Falco sparverius deserticolus. Resident,
though rare; taken in Middle and South Parks.
364. American osprey. Pandion haliaëtus carolinensis. Summer resident;
not uncommon locally; breeds as high as 9,000 feet; has been taken in
fall at an altitude of 10,500 feet.
365. American barn owl. Strix pratincola. Resident; quite rare; a
southern species rarely coming so far north as Colorado.
366. American long-eared owl. Asio wilsonianus. Common resident; winters
from plains to 10,000 feet; breeds from plains to 11,000 feet; eggs laid
early in April.
367. Short-eared owl. Asio accipitrinus. Resident, but not common;
highest record 9,500 feet.
368. Barred owl. Syrnium nebulosum. Resident; few records; one breeding
pair found in the northeastern part of the State.
369. Spotted owl. Syrnium occidentale. Resident; not common; a little
doubt as to its identity; but Mr. Aiken vouches for its presence in the
State.
371. Richardson's owl. Nyctala tengmalmi richardsoni. Rare winter
visitor; a northern species.
372. Saw-whet owl. Nyctala acadica. Resident; not uncommon; occurs
throughout the State below 8,000 feet.
373. Screech owl. Magascops asio. Rare resident; the eastern analogue of
the next.
373e. Rocky Mountain screech owl. Magascops asio maxwelliæ. Common
resident; found from plains and foothills to about 6,000 feet; rare
visitant at nearly 9,000 feet.
373g. Aiken's screech owl. Megascops asio aikeni. Resident; limited to
from 5,000 to 9,000 feet.
374. Flammulated screech owl. Megascops flammeola. Rare resident; rarest
owl in Colorado, if not in the United States; ten instances of breeding,
all in Colorado; twenty-three records in all for the State.
375a. Western horned owl. Bubo virginianus pallescens. Common resident;
breeds on the plains and in the mountains.
375b. Arctic horned owl. Bubo virginianus arcticus. Winter visitor; not
uncommon; breeds in arctic America.
376. Snowy owl. Nyctea nyctea. Rare winter visitor; occurs on the plains
and in the lower foothills; range in summer, extreme northern portions
of northern hemisphere.
378. Burrowing owl. Speotyto cunicularia hypogæa. Resident; abundant
locally; breeds on plains and up to 9,000 feet.
379. Pygmy owl. Glaucidium gnoma. Resident; rare; favorite home in the
mountains; breeds as high as 10,000 feet.
382. Carolina paroquet. Conurus carolinensis. Formerly resident; few
records; general range, east and south; now almost exterminated.
385. Road-runner. Geococcyx californianus. Resident; not common;
restricted to southern portion of the State; breeds throughout its
range; rare above 5,000 feet, though one was found in the Wet Mountains
at an altitude of 8,000 feet.
387. Yellow-billed cuckoo. Coccyzus americanus. Rare summer visitor, on
the authority of Major Bendire.
387a. California cuckoo. Coccyzus americanus occidentalis. Summer
resident; not uncommon locally; mostly found on the edge of the plains,
but occasionally up to 8,000 feet in mountains.
388. Black-billed cuckoo. Coccyzus erythrophthalmus. Rare migrant; only
two records.
390. Belted kingfisher. Ceryle alcyon. Common resident; breeds from
plains to 10,000 feet; a few remain in winter.
393e. Rocky Mountain hairy woodpecker. Dryobates villosus monticola.
Common resident; breeds from plains to 11,000 feet; winter range almost
the same.
394c. Downy woodpecker. Dryobates pubescens medianus. Visitor; rare, if
not accidental.
394b. Batchelder's woodpecker. Dryobates pubescens homorus. Common
resident; breeding range from plains to 11,500 feet; winter range from
plains to 10,000 feet.
396. Texan woodpecker. Dryobates scalaris bairdi. Resident; rare and
local; southern range generally.
401b. Alpine three-toed woodpecker. Picoides americanus dorsalis.
Resident; not common; a mountain bird; range, 8,000 to 12,000 feet; even
in winter remains in the pine belt at about 10,000 feet.
402. Yellow-bellied sapsucker. Sphyrapicus varius. Rare migrant; eastern
form, scarcely reaching the base of the Rockies.
402a. Red-naped sapsucker. Sphyrapicus varius nuchalis. Common summer
resident; breeds from plains to 12,000 feet, but partial to the
mountains. Author saw one at Green Lake.
404. Williamson's sapsucker. Sphyrapicus thyroideus. Common summer
resident; breeds from 5,000 feet to upper limits of the pines; range
higher in the southern part of the State than in the northern.
405a. Northern pileated woodpecker. Ceophlœus pileatus abieticola.
Resident; very rare; only probably identified.
406. Red-headed woodpecker. Melanerpes erythrocephalus. Common summer
resident; breeds from plains to 10,000 feet; late spring arrival; same
form in the East and West.
408. Lewis's woodpecker. Melanerpes torquatus. Common resident;
characteristic bird of the foothills; sometimes seen as high as 10,000
feet in southern Colorado; probably does not breed above 9,000 feet.
409. Red-bellied woodpecker. Melanerpes carolinus. Summer visitor; rare,
if not accidental; eastern and southern species, not occurring regularly
west of central Kansas.
412a. Northern flicker. Colaptes auratus luteus. Rare migrant; range
extends only to foothills; no record of its breeding.
413. Red-shafted flicker. Colaptes cafer. Abundant summer resident;
breeds from plains to 12,000 feet; almost as plentiful at its highest
range as on the plains; early spring arrival; a few winter in the State.
418. Poor-will. Phalænoptilus nuttallii. Common summer resident; breeds
from plains to 8,000 feet; has been noted up to 10,000 feet.
418a. Frosted poor-will. Phalænoptilus nuttallii nitidus. Rare summer
resident; few typical nitidus taken; a more southern variety.
420a. Western nighthawk. Chordeiles virginianus henryi. Abundant summer
resident; breeds on the plains and up to about 11,000 feet; in fall
ranges up to 12,000 feet; most common on plains and in foothills.
422. Black swift. Cypseloides niger borealis. Summer resident; abundant
locally; southwestern part of the State; breeds from 10,000 to 12,000
feet, and ranges up to 13,000 feet.
425. White-throated swift. Aeronautes melanoleucus. Summer resident; not
uncommon locally; breeds in inaccessible rocks from 6,000 to 12,000
feet, if not higher; most common in southern part of the State.
429. Black-chinned humming-bird. Trochilus alexandri. Summer resident;
local; only in southwestern part of the State, and below 6,000 feet.
432. Broad-tailed humming-bird. Selasphorus platycercus. Common summer
resident; Colorado's most common hummer; breeds from foothills to 11,000
feet; ranges 2,000 feet above timber-line in summer.
433. Rufous humming-bird. Selasphorus rufus. Summer resident; local; a
western species, coming into southwestern Colorado, where it breeds from
7,000 to 10,000 feet, and ranges in summer several thousand feet higher;
a few records east of the range.
436. Calliope humming-bird. Stellula calliope. Summer visitor; rare or
accidental; but two records, one near Breckenridge at an altitude of
9,500 feet; western species.
443. Scissor-tailed flycatcher. Milvulus forficatus. Summer visitor;
rare or accidental; but one record; southern range, and more eastern.
444. Kingbird. Tyrannus tyrannus. Common summer resident; occurs only on
plains and in foothills up to 6,000 feet; same form as the eastern
kingbird.
447. Arkansas kingbird. Tyrannus verticalis. Common summer resident;
more common in eastern than western part of the State; fond of the
plains and foothills, yet breeds as high as 8,000 feet.
448. Cassin's kingbird. Tyrannus vociferans. Common summer resident;
breeds on plains and up to 9,000 feet in mountains; occurs throughout
the State.
454. Ash-throated flycatcher. Myiarchus cinerascens. Rare summer
resident; western species, coming east to western edge of plains.
455a. Olivaceous flycatcher. Myiarchus lawrencei olivascens. Summer
visitor, rare, if not accidental; a southern species; taken once in
Colorado.
456. Phœbe. Sayornis phœbe. Rare summer visitor; comes west to
eastern border of the State.
457. Say's phœbe. Sayornis saya. Common summer resident; most common
on the plains; occurs on both sides of the range; the author found it a
little above Malta, at Glenwood, and in South Park.
459. Olive-sided flycatcher. Contopus borealis. Common summer resident;
breeds only in the mountains, from 7,000 to 12,000 feet.
462. Western wood pewee. Contopus richardsonii. Common summer resident;
most common in breeding season from 7,000 to 11,000 feet.
464. Western flycatcher. Empidonax difficilis. Common summer resident;
breeds from plains to 10,000 feet, but most common in upper part of its
range.
466. Traill's flycatcher. Empidonax traillii. Fairly common summer
resident; most common on the plains, but occurs in mountains up to 8,000
feet; breeds throughout its Colorado range.
467. Least flycatcher. Empidonax minimus. Rare migrant; west to eastern
foothills; probably breeds, but no nests have been found.
468. Hammond's flycatcher. Empidonax hammondi. Common summer resident;
comes east only to the western edge of the plains; breeds as high as
9,000 feet.
469. Wright's flycatcher. Empidonax wrightii. Abundant summer resident;
breeds from 7,500 feet to 10,000.
474a. Pallid horned lark. Otocoris alpestris leucolæma. Abundant winter
resident; literature on this bird somewhat confused on account, no
doubt, of its close resemblance to the next; winters on the plains
abundantly, and sparsely in the mountains.
474c. Desert horned lark. Otocoris alpestris arenicola. Abundant
resident; winters on plains and in mountains up to 9,000 feet; breeds
from plains to 13,000 feet; raises two broods.
475. American magpie. Pica pica hudsonica. Common resident; breeds
commonly on the plains and in the foothills and lower mountains; a few
breed as high as 11,000 feet.
478b. Long-crested jay. Cyanocitta stelleri diademata. Common resident;
seldom strays far east of the foothills; breeds from base of foothills
to timber-line; winter range from edge of plains almost to 10,000 feet.
480. Woodhouse's jay. Aphelocoma woodhousei. Common resident; most
common along the base of foothills and lower wooded mountains; sometimes
breeds as high as 8,000 feet; in fall roams up to 9,500 in special
instances.
484a. Rocky Mountain jay. Perisoreus canadensis capitalis. Common
resident; remains near timber-line throughout the year.
486. American raven. Corvus corax sinuatus. Resident; common locally;
breeds; rather of western Colorado, but visitant among eastern
mountains.
487. White-necked raven. Corvus cryptoleucus. Rare resident now;
formerly abundant along eastern base of the front range and a hundred
miles out on the plains; now driven out by advent of white man.
488. American crow. Corvus americanus. Resident; common in northeastern
Colorado; rare in the rest of the State.
491. Clark's nutcracker. Nucifraga columbiana. Abundant resident; a
mountain bird; breeds from 7,000 to 12,000 feet; sometimes in fall
gathers in "enormous flocks"; at that season wanders up to at least
13,000 feet; most remain in the mountains through the winter, though a
few descend to the plains.
492. Pinon jay. Cyanocephalus cyanocephalus. Resident; abundant locally;
breeds almost exclusively among the pinon pines; keeps in small parties
during breeding season; then gathers in large flocks; wandering up to
10,000 feet.
494. Bobolink. Dolichonyx oryzivorus. Rare summer visitor.
495. Cowbird. Molothrus ater. Common summer resident; breeds from plains
to about 8,000 feet; author saw several in South Park.
497. Yellow-headed blackbird. Xanthocephalus xanthocephalus. Common
summer resident; breeds in suitable places on the plains and in mountain
parks.
498. Red-winged blackbird. Agelaius phœniceus. Common summer
resident; breeds mostly below 7,500 feet, though occasionally ascends to
9,000.
501b. Western meadow-lark. Sturnella magna neglecta. Abundant summer
resident.
506. Orchard oriole. Icterus spurius. Summer visitor; rare, if not
accidental.
507. Baltimore oriole. Icterus galbula. Marked as a rare summer
resident, though no record of nesting.
508. Bullock's oriole. Icterus bullocki. Abundant summer resident;
breeds on plains and in mountain regions below 10,000 feet.
509. Rusty blackbird. Scolecophagus carolinus. Migrant; rare, if not
accidental; two records.
510. Brewer's blackbird. Scolecophagus cyanocephalus. Abundant summer
resident.
511b. Bronzed grackle. Quiscalus quiscula æneus. Summer resident; not
uncommon locally; comes only to eastern base of mountains.
514a. Western evening grosbeak. Coccothraustes vespertinus montanus.
Resident; found every month of the year; no nests found, but evidently
breeds.
515a. Rocky Mountain pine grosbeak. Pinicola enucleator montana.
Resident; not uncommon; most common in late summer and fall when most of
them are just below timber-line; stragglers descend to foothills and
plains.
517. Purple finch. Carpodacus purpureus. Migrant; rare, if not
accidental; only one specimen, and that a female.
518. Cassin's purple finch. Carpodacus cassini. Common resident; winters
from plains to 7,000 feet; breeds from that altitude to 10,000 feet.
519. House finch. Carpodacus mexicanus frontalis. Abundant resident.
521a. Mexican crossbill. Loxia curvirostra stricklandi. Resident; not
uncommon; has been seen in summer at 11,000 feet; breeds in mountains,
perhaps in winter like its eastern antitype.
522. White-winged crossbill. Loxia leucoptera. Rare winter visitor; one
record.
524. Gray-crowned leucosticte. Leucosticte tephrocotis. Rare winter
visitor; western species.
524a. Hepburn's leucosticte. Leucosticte tephrocotis littoralis. Rare
winter visitor; summers in the North.
525. Black leucosticte. Leucosticte atrata. Rare winter visitor; summer
range unknown; winters in the Rockies.
526. Brown-capped leucosticte. Leucosticte australis. This little bird
and the white-tailed ptarmigan have the highest summer range of any
Colorado birds.
528. Redpoll. Acanthis linaria. Common winter resident; lives from
plains to 10,000 feet.
528b. Greater redpoll. Acanthis linaria rostrata. Rare or accidental
winter visitor; one record.
529. American goldfinch. Astragalinus tristis. Resident; quite common in
summer; sometimes reaches 10,000 feet.
529a. Western goldfinch. Astragalinus tristis pallidus. Migrant;
probably common; added by Mr. Aiken.
530. Arkansas goldfinch. Astragalinus psaltria. Common summer resident;
breeds from plains to over 9,000 feet.
530a. Arizona goldfinch. Astragalinus psaltria arizonæ. Summer resident;
not common.
530b. Mexican goldfinch. Astragalinus psaltria mexicanus. Rare, but
believed to be a summer resident at Trinidad.
533. Pine siskin. Spinus pinus. Common resident; breeding range from
plains to timber-line.
000. English sparrow. Passer domesticus. Rapidly increasing in numbers;
has settled at points west of the range.
534. Snowflake. Passerina nivalis. Rare winter visitor; one record west
of the range; several east.
536a. Alaskan longspur. Calcarius lapponicus alascensis. Common winter
resident; breeds far north.
538. Chestnut-collared longspur. Calcarius ornatus. Rare summer
resident; winter resident, not common; common in migration.
539. McCown's longspur. Rhyncophanes mccownii. Common winter resident,
dwelling on the plains.
540a. Western vesper sparrow. Poocætes gramineus confinis. Abundant
summer resident; breeds from plains to 12,000 feet.
542b. Western savanna sparrow. Ammodramus sandwichensis alaudinus.
Common summer resident; breeds from base of foothills to almost 12,000
feet.
545. Baird's sparrow. Ammodramus bairdii. Migrant; not common; a number
taken east of the range, and one west.
546a. Western grasshopper sparrow. Ammodramus savannarum perpallidus.
Not uncommon summer resident; breeds on plains and in lower foothills.
552a. Western lark sparrow. Chondestes grammacus strigatus. Common
summer resident; breeds on plains and in mountain parks to 10,000 feet.
553. Harris's sparrow. Zonotrichia querula. Rare migrant; abundant
migrant in Kansas.
554. White-crowned sparrow. Zonotrichia leucophrys. Abundant summer
resident.
554a. Intermediate sparrow. Zonotrichia leucophrys gambelii. Common
migrant, both east and west of the range; breeds north of the United
States.
557. Golden-crowned sparrow. Zonotrichia coronata. Accidental winter
visitor; Pacific Coast species; breeds in Alaska.
558. White-throated sparrow. Zonotrichia albicollis. Rare migrant; but
three records.
559a. Western tree sparrow. Spizella monticola ochracea. Common winter
resident; mostly on plains and in lower mountains.
560. Chipping sparrow. Spizella socialis. Rare summer resident; common
in migration; goes as far west as base of the mountains.
560a. Western chipping sparrow. Spizella socialis arizonæ. Abundant
summer resident; breeds from base of foothills to 10,000 feet.
561. Clay-colored sparrow. Spizella pallida. Summer resident; not
uncommon; scattered over State east of mountains.
562. Brewer's sparrow. Spizella breweri. Summer resident; not uncommon;
breeds from plains to 8,000 feet.
566. White-winged junco. Junco aikeni. Common winter resident; on plains
and 8,000 feet up in the mountains.
567. Slate-colored junco. Junco hyemalis. Winter resident; not common;
not found above 8,000 feet.
567b. Shufeldt's junco. Junco hyemalis connectens. Abundant winter
resident; most common in southern part of the State; not uncommon
elsewhere.
567.1. Montana junco. Junco montanus. Winter visitor; not uncommon.
568. Pink-sided junco. Junco mearnsi. Common winter resident; plentiful
at base of foothills in winter; in spring ascend to 10,000 feet; then
leaves the State for the North.
568.1. Ridgway's junco. Junco annectens. Rare winter visitor; one
record.
569. Gray-headed junco. Junco caniceps. Abundant resident; breeds from
7,500 to 12,000 feet; sometimes rears three broods.
570a. Red-backed junco. Junco phæonotus dorsalis. Rare migrant; abundant
just south of State.
573a. Desert sparrow. Amphispiza bilineata deserticola. Summer
resident; not uncommon locally; found only in southwestern part of the
State.
574a. Sage sparrow. Amphispiza belli nevadensis. Abundant summer
resident; common on sage-brush plains of western and southwestern
Colorado; ranges as far east as San Luis Park and north to Cheyenne,
Wyoming.
581. Song-sparrow. Melospiza fasciata. Rare migrant; found only at
eastern border of State.
581b. Mountain song-sparrow. Melospiza fasciata montana. Common summer
resident; a few remain on plains in mild winters; breeds from plains to
8,000 feet.
583. Lincoln's sparrow. Melospiza lincolni. Common summer resident;
abundant in migration; breeds from base of foothills to timber-line.
584. Swamp sparrow. Melospiza georgiana. Accidental summer visitor; one
record.
585c. Slate-colored sparrow. Passerella iliaca schistacea. Rare summer
resident; only three records.
588. Arctic towhee. Pipilo maculatus arcticus. Winter resident; not
uncommon; comes to base of Rocky Mountains in winter; breeds in the
North, as far as the Saskatchewan River.
588a. Spurred towhee. Pipilo maculatus megalonyx. Common summer
resident; upper limit, 9,000 feet.
591. Cañon towhee. Pipilo fuscus mesoleucus. Resident; common locally;
all records from Arkansas Valley; rare at an altitude of 10,000 feet.
592. Abert's towhee. Pipilo aberti. Rare summer resident; species
abundant in New Mexico and Arizona.
592.1. Green-tailed towhee. Oreospiza chlorura. Common summer resident;
melodious songster.
593. Cardinal. Cardinalis cardinalis. Winter visitor; rare, if not
accidental; two records.
595. Rose-breasted grosbeak. Zamelodia ludoviciana. Accidental summer
resident; one record.
596. Black-headed grosbeak. Zamelodia melanocephala. Common summer
resident; breeds from plains to 8,500 feet; has been seen at 10,000
feet.
597a. Western blue grosbeak. Guiraca cærulea lazula. Summer resident;
not uncommon locally; southern part of State; author saw one pair at
Colorado Springs.
598. Indigo bunting. Cyanospiza cyanea. Rare summer visitor; range,
farther east.
599. Lazuli bunting. Cyanospiza amœna. Abundant summer resident; does
not breed far up in the mountains, but has been taken at 9,100 feet.
604. Dickcissel. Spiza americana. Rare summer resident; only on plains
and in foothills.
605. Lark bunting. Calamospiza melanocorys. Abundant summer resident;
very plentiful on the plains; sometimes breeds as far up in mountains as
9,000 feet.
607. Louisiana tanager. Piranga ludoviciana. Common summer resident; in
migration common on the plains, but breeds from 6,000 to 10,000 feet.
608. Scarlet tanager. Piranga erythromelas. Rare migrant.
610a. Cooper's tanager. Piranga rubra cooperi. Rare or accidental summer
visitor; abundant in New Mexico and Arizona; only one record for
Colorado.
611. Purple martin. Progne subis. Summer resident; local; rare in
eastern, quite common in western part of the State.
612. Cliff-swallow. Petrochelidon lunifrons. Abundant summer resident;
breeds everywhere from plains to 10,000 feet; nests on cliffs and
beneath eaves.
613. Barn swallow. Hirundo erythrogaster. Common summer resident; breeds
from plains to 10,000 feet.
614. Tree swallow. Tachycineta bicolor. Summer resident; not uncommon;
breeds occasionally on the plains; more frequently in mountains up to
10,000 feet.
615. Violet-green swallow. Tachycineta thalassina. Summer resident;
abundant locally; a few breed on plains; more commonly from 6,000 to
10,500 feet.
616. Bank swallow. Clivicola riparia. Rare summer resident; rarest
Colorado swallow; from plains to foothills.
617. Rough-winged swallow. Stelgidopteryx serripennis. Summer resident;
not uncommon; breeds below 7,500 feet.
618. Bohemian waxwing. Ampelis garrulus. Winter resident; not uncommon;
breeds north of the United States.
619. Cedar waxwing. Ampelis cedrorum. Resident; not common; breeds from
plains to about 9,000 feet.
621. Northern shrike. Lanius borealis. Common winter resident; on its
return from the North in October it first appears above timber-line,
then descends to the plains.
622a. White-rumped shrike. Lanius ludovicianus excubitorides. Common
summer resident; breeds mostly on the plains; sometimes in mountains up
to 9,500 feet.
624. Red-eyed vireo. Vireo olivaceus. Rare summer resident; an eastern
species, coming only to base of foothills; still, one was taken at
11,000 feet.
627. Warbling vireo. Vireo gilvus. Common summer resident; breeds
sparingly on the plains; commonly in mountains up to 10,000.
629a. Cassin's vireo. Vireo solitarius cassinii. Rare or accidental
summer visitor; not known to breed; a southwestern species.
629b. Plumbeous vireo. Vireo solitarius plumbeus. Summer resident;
common; breeds in foothills and mountains up to over 9,000 feet.
636. Black and white warbler. Mniotilta varia. Rare summer visitor; two
records.
644. Virginia's warbler. Helminthophila virginiæ. Common summer
resident; western bird, but breeds along eastern base of foothills.
646. Orange-crowned warbler. Helminthophila celata. Summer resident; not
uncommon; common migrant; breeds from 6,000 to 9,000 feet.
646a. Lutescent warbler. Helminthophila celata lutescens. Summer
resident; not uncommon: western form of the orange-crowned warbler;
ranges to eastern base of mountains.
647. Tennessee warbler. Helminthophila peregrina. Rare migrant; eastern
Colorado to base of mountains.
648. Parula warbler. Compsothlypis americana. Rare summer resident;
comes to base of foothills.
652. Yellow warbler. Dendroica æstiva. Abundant summer resident; breeds
up to 8,000 feet.
652a. Sonora yellow warbler. Dendroica æstiva sonorana. Summer
resident; probably common; to the southwest æstiva shades into
sonorana.
654. Black-throated blue warbler. Dendroica cærulescens. Rare migrant;
one record.
655. Myrtle warbler. Dendroica coronata. Common migrant; scarcely known
west of the range.
656. Audubon's warbler. Dendroica auduboni. Abundant summer resident;
breeds from 7,000 to 11,000 feet.
657. Magnolia warbler. Dendroica maculosa. Rare migrant; breeds
northward.
658. Cerulean warbler. Dendroica rara. Rare migrant; one record.
661. Black-poll warbler. Dendroica striata. Rare summer resident;
sometimes common in migration; one breeding record for the State—at
Seven Lakes; altitude, 11,000 feet.
664. Grace's warbler. Dendroica graciæ. Summer resident; common in
extreme southwestern part of the State.
665. Black-throated gray warbler. Dendroica nigrescens. Summer resident;
not infrequent; breeds in pinon hills near Cañon City.
668. Townsend's warbler. Dendroica townsendi. Summer resident; not
uncommon; western species, coming east to base of foothills and a few
miles out on plains; breeds from 5,500 to 8,000 feet in western
Colorado; in fall it is found as high as 10,000 feet.
672. Palm warbler. Dendroica palmarum. Rare or accidental migrant; one
specimen seen.
674. Oven-bird. Seiurus aurocapillus. Rare breeder, on Mr. Aiken's
authority.
675a. Grinnell's water thrush. Seiurus noveboracensis notabilis. Rare
migrant; appearing from plains to 8,000 feet.
678. Connecticut warbler. Geothlypis agilis. Rare or accidental migrant;
one record by Mr. Aiken.
680. Macgillivray's warbler. Geothlypis tolmiei. Common summer resident;
breeds from base of foothills to 9,000 feet.
681. Maryland yellow-throat. Geothlypis trichas. One taken at Colorado
Springs by Mr. Aiken.
681a. Western yellow-throat. Geothlypis trichas occidentalis. Common
summer resident, almost restricted to the plains; both sides of the
range.
683. Yellow-breasted chat. Icteria virens. Accidental summer visitor.
683a. Long-tailed chat. Icteria virens longicauda. Common summer
resident; scarcely found in the mountains, but frequent in the lower
foothills and on the plains; never seen above 8,000 feet.
685. Wilson's warbler. Wilsonia pusilla. Abundant summer resident;
centre of abundance in breeding season, 11,000 feet; known to breed at
12,000 feet; also as low as 6,000.
685a. Pileolated warbler. Wilsonia pusilla pileolata. Summer resident;
not uncommon; Mr. Aiken thinks it as plentiful as preceding.
686. Canadian warbler. Wilsonia canadensis. Rare or accidental migrant;
one record by Mr. Aiken.
687. American redstart. Setophaga ruticilla. Summer resident; not
uncommon in eastern, rare in western, Colorado; breeds below 8,000
feet.
697. American pipit. Anthus pensilvanicus. Common summer resident;
breeds only on summits of the mountains.
701. American dipper. Cinclus mexicanus. Resident; common in favorite
localities; one seen above timber-line in October.
702. Sage thrasher. Oroscoptes montanus. Summer resident; breeds from
plains to nearly 10,000 feet; western species, coming east to mountain
slopes.
703. Mocking-bird. Mimus polyglottos. Summer resident; common locally;
mostly on plains, but sometimes reaches 8,000 feet.
704. Catbird. Galeoscoptes carolinensis. Common summer resident; from
plains to 8,000 feet.
705. Brown thrasher. Harporhynchus rufus. Not uncommon as summer
resident; almost restricted to the plains.
708. Bendire's thrasher. Harporhynchus bendirei. Summer resident; rare
and local; south central part of State.
715. Rock wren. Salpinctes obsoletus. Common summer resident; breeds
from plains to 12,000 feet.
717a. Cañon wren. Catherpes mexicanus conspersus. Rare resident; one
nest recorded.
719b. Baird's wren. Thryomanes bewickii leucogaster. Rare summer
resident.
721b. Western house wren. Troglodytes aëdon aztecus. Common summer
resident; from plains to 10,000 feet; raises two broods, sometimes
three.
722. Winter wren. Anorthura hiemalis. Rare resident; no nest found.
725a. Tulé wren. Cistothorus paludicola. Summer resident; not uncommon;
breeds from plains to 8,000 feet; some remain all winter in hot-water
swamps.
725c. Western marsh wren. Cistothorus palustris plesius. Summer
resident; not uncommon locally.
726b. Rocky Mountain creeper. Certhia familiaris montana. Common
resident; in breeding season confined to the immediate vicinity of
timber-line, where some remain the year round.
727. White-breasted nuthatch. Sitta carolinensis. Resident; not common.
727a. Slender-billed nuthatch. Sitta carolinensis aculeata. Common
resident; western form; commonly breeds from 7,500 feet to timber-line.
728. Red-breasted nuthatch. Sitta canadensis. Not uncommon resident;
migrant on the plains; resident in the mountains to about 8,000 feet,
sometimes 10,000.
730. Pigmy nuthatch. Sitta pygmæa. Abundant resident; mountain bird;
makes scarcely any migration; most common from 7,000 to 10,000 feet.
733a. Gray titmouse. Parus inornatus griseus. Resident; not common;
southern species, coming to eastern foothills.
735a. Long-tailed chickadee. Parus atricapillus septentrionalis. Not
uncommon resident; winters on plains and in foothills; breeds from 7,000
to 10,000 feet; sometimes on plains.
738. Mountain chickadee. Parus gambeli. Abundant resident; nests from
8,000 feet to timber-line; ranges in the fall to the tops of the
loftiest peaks.
744. Lead-colored bush-tit. Psaltriparus plumbeus. Resident; not
common; western species, coming to eastern foothills.
748. Golden-crowned kinglet. Regulus satrapa. Rare summer resident;
rather common in migration; breeds only near timber-line at about
11,000.
749. Ruby-crowned kinglet. Regulus calendula. Abundant summer resident;
breeds from 9,000 feet to timber-line.
751. Blue-gray gnatcatcher. Polioptila cærulea. Rare summer resident;
breeds on the plains and in the foothills.
754. Townsend's solitaire. Myadestes townsendii. Common resident; breeds
from 8,000 to 12,000 feet; winters in mountains, though stragglers are
sometimes seen on the plains. The author saw a pair on plains near
Arvada, in company with a young, well-fledged bird.
756a. Willow thrush. Hylocichla fuscescens salicicola. Summer resident;
rather common; breeds in foothills and parks up to about 8,000 feet.
758a. Olive-backed thrush. Hylocichla ustulata swainsonii. Rare migrant.
758c. Alma's thrush. Hylocichla ustulata alamæ. Rare summer resident; in
migration common.
759. Dwarf hermit thrush. Hylocichla aonalaschkæ. Rare migrant.
759a. Audubon's hermit thrush. Hylocichla aonalaschkæ auduboni. Common
summer resident; breeds from 8,000 feet to timber-line.
759b. Hermit thrush. Hylocichla aonalaschkæ pallasii. Rare migrant;
comes to the eastern edge of Colorado, just touching range of
auduboni.
761. American robin. Merula migratoria. Summer resident, but not common;
some interesting questions arise in connection with intermediate forms.
761a. Western robin. Merula migratoria propinqua. Abundant summer
resident; breeds from plains to timber-line.
765a. Greenland wheatear. Saxicola œnanthe leucorhoa. European
species; a straggler taken at Boulder by Minot.
766. Bluebird. Sialia sialis. Rare summer resident; west to base of
Rockies.
767a. Chestnut-backed bluebird. Sialia mexicana bairdi. Summer resident;
not common; western form, coming east as far as Pueblo.
768. Mountain bluebird. Sialia arctica. Abundant summer resident; breeds
from plains to timber-line; in autumn roams up to at least 13,000
feet.