JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 



623 



Bank Swallow. 



The Bank Swallow is a very common summer resident in Illinois 

 and Wisconsin from May until about the first of September. 



The majority breed early in June. The nest is in a hole in the 

 side of a steep bank. Where sand banks are available, they usually 

 breed in colonies. The eggs are from 3 to 6, pure white, and measure 

 about .69 x .48 inches. 



Genus STELGIDOPTERYX Baird. 

 288. Stelgidopteryx serripennis (Auo.). 



ROUGH-WINGED SWALLOW. 



Distr.: Breeds throughout whole of United States (except por- 

 tions of the extreme northern border), northern Mexico and south- 

 ern British Columbia ; south in winter to Mexico and Central America 

 to Costa Rica. 



Special characters: Resembles the 

 Bank Swallow, but has no distinct band 

 on the breast, the under parts being 

 brow r nish gray, gradually shading into 

 white on the lower belly and under tail 

 coverts. In the adult bird, the edge of 

 the outer web of the outer primary is 

 rough, the feathers being recurved and 

 resembling a series of little hooks. 



Length, about 5.60; wing, 4.20; tail, 2.10; bill, .25. 



The Rough-winged Swallow is a common summer resident 



