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.