BIRDS OF COLORADO. 
Ill 
613. Chelidon crythrogastra. 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 fora 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. Clivicola 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 Waxv/ing. 
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 
9,000 feet. Breeds about the middle of June. 
