LIST AND DESCRIPTION 121 
614. Tree SwaLitow (Iridoprocne bicolor.) 
“An abundant migrant and rare breeder” (Visher, for Clay 
County). 
Upper parts glossy green; wings and tail darker; belly 
white. — 
The Tree Swallows nest in abandoned Woodpecker holes 
and can be encouraged to rear their young in bird houses. 
615. NorRTHERN VIOLET-GREEN SWALLOW (Tachycineta thalassina 
lepida.) 
A western species occasionally seen in the western part of 
South Dakota during the summer. One of the smallest of our 
Swallows. Above, glossy green; around eyes and under parts 
white. 
616. BANK SWALLow (Riparia riparia.) 
This is our smallest and lightest colored Swallow, being 
grayish brown. 
It is easily recognized by the wide, grayish brown band 
across the breast. Like the Cliff Swallows, they nest in colo- 
nies, tunneling their holes into banks and making a grass nest at 
the enlarged end. 
617. RoUGH-WINGED SWALLow (Stelgidopteryx serripennis.) 
Very like the Bank Swallow and with similar nesting 
habits, but without a band across the breast. 
FAMILY BOMBYCILLIDZ. WAXWINGS 
Waxwings are represented in North America by only two 
species and South Dakota entertains one as a summer and the 
other as a winter resident. They are usually seen in small flocks 
feeding on cedar or other wild berries. 
618. BoHEMIAN WAxwWING (Bombycilla garrula.) 
An irregular winter resident, always in compact flocks of 
a dozen or so. Brownish gray, with plumage of smooth, velvety 
effect. Distinguishing marks are the crest, the black throat, the 
wax-wing tips, and yellow on the end of the tail. They keep 
well up in the trees and seldom utter a note. 
