Jan., 1909. Birds of Illinois and Wisconsin — Cory. 



623 



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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, ptire white, and measure 

 about .69 X .48 inches. 



Genus STELGIDOPTERYX Baird. 

 288. Stelgidopteryx serripennis (Aud.). 

 Rough-winged Swallow. 

 Disir.: 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 

 -ri on the breast, the under parts being 



brownish gray, gradually shading into 

 white on the lower belly and under tail 

 ^ coverts. In the adult bird, the edge of 



'\Kv^^ ^he 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 



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