BIRDS OF COLORADO. Ill 



613. Chelidon erythrogastra. Barn Swallow. 

 Summer resident; common. Breeds on the plains and in 



the mountains to 10,000 feet, but nowhere in such numbers as 

 lunifrons or thalassina. Arrives the last of April. Breeds in 

 June and often raises two broods. H. G. Smith says that the 

 same pair returned to his place in Denver to breed for fifteen 

 consecutive years. 



614. Tachycineta bicolor. Tree Swallow. 



Summer resident; not uncommon, but rare for a Swallow. 

 Breeds occasionally on the plains and more frequently in the 

 mountains to 10,000 feet. Arrives in April and breeds from the 

 last of May to the last of June. Departs in September. 



615. Tachycineta thalassina. Violet-green Swallow. 

 Summer resident ; abundant, locally. Throughout west- 

 ern Colorado and east to the edge of the plains. A few breed 

 on the plains, but more commonly from 6,000 to 10,500 feet. 

 Arrives from the first week in May on the plains to the last of 

 the month in the mountains. Begins laying late in June to the 

 first of July. Deserts the higher regions in August and the 

 lower early in September. 



616. Ciivicola riparia. Bank Swallow. 



Summer resident ; rare. The rarest Swallow in Colorado. 

 Arrives the last of April and breeds on the plains and at the 

 base of the foothills. 



617. Stelgidopteryx serripennis. Rough-winged Swallow. 

 Summer resident ; not uncommon. Much more common 



than the Bank Swallow. Breeds near streams on the plains 

 and in the lower portions of the mountains below 7,500 feet. 

 Arrives early in May. 



618. Ampelis garrulus. Bohemian Waxwing. 



Winter resident; not uncommon. Irregular in its move- 

 ments and numbers. Has been noted at one time or another 

 from most of the State; rather rare on the plains and more 

 common in the mountains to at least 8,000 feet. Breeds north 

 of the United States and reaches southern Colorado in Novem- 

 ber; remaining through the winter. The bulk leave late in 

 February or early March. Has been taken at Denver by H. G. 

 Smith as late as March 22, 1884. 



619. Ampelis cedrorum. Cedar Waxwing. 



Resident; not common; local and irregular. Scattered 

 over the lower portions of the State during the fall, winter and 

 spring. Breeds on the plains and in the mountains to about 

 9,OQO feet. Breeds about the middle of June. 



