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.