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.