ROUGH-WINGED SWALLOW 



195 



the marshes near New York by the first of July. 

 Mr. Chapman says that they sail about in circles 

 more than other Swallows. 



Rough-winged Swallow : Stelgidopteryx serripennis. 



Sooty brown above ; breast uniform light sooty. Length, 5j 

 inches. 



Geographic Distribution. — North America ; breeds as far 

 north as British Columbia, Minnesota, and Connecticut ; win- 

 ters in the tropics. 



The Rough-winged Swallow gets its name from 

 the small, recurved booklets set like the teeth of a 

 saw along the edge of 

 the outside feathers of 

 the wing in the male. 

 It may be mistaken 

 for the Bank Swallow, 

 unless it is remembered 

 that the Bank Swallow 

 has a dark band across 

 the breast (Fig. 24, p. 

 55). The nesting hab- 

 its of the two also differ. 

 The Eough-winged does not build in colonies like 

 the Bank, but usually nests in isolated pairs in 

 holes in sand-banks, stone ruins, culverts, and 

 abutments. Near Washington, in the stone walls 

 of the canal, it is particularly abundant. When 

 made in sand, the entrance to the burrow is said 

 to be round rather than elliptical, as the Bank 

 Swallow's is, and the burrow itself is there s^en- 



FiG. 123. 



Rough-winged Swallow. 



