Part 17
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.= CEOPHLOEUS 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. =Phoebe.= SAYORNIS PHOEBE. Rare summer visitor; comes west to eastern border of the State.
457. =Say's phoebe.= 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 PHOENICEUS. 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 AMOENA. 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.