THE ROUGH-WINGED SWALLOW. 335 
perpendicular surfaces, for they are bent forward, and the bird is not known 
to cling head-downward. It is easy to see how the bird might brace its wings 
against the sides of its nesting tunnel to prevent forcible abduction, but no one 
knows of a possible enemy which might be circumvented in this way. 
Again, the Rough-winged Swallow has a steadier, rather more labored 
flight than that of its foil. Its aerial course is more dignified, leisurely, less 
impulsive and erratic. In nesting, altho it may include the range of the Sand 
Martin, or even nest side by side with it, it has a wider latitude for choice and 
ken in Oregon. Photo by H. T. Bohlman and W. L. Finley. 
BABY ROUGH-WINGS. 
is not hampered by local tradition. If it burrows in a bank it is quite as likely 
to dig near the bottom as the top. Crevices in masonry or stone quarries, 
crannies and abutments of bridges or even holes in trees, are utilized. In 
Lincoln County where cover is scarce and the food supply attractive, I found 
them nesting along irrigating ditches with banks not over two feet high. One 
guileless pair I knew excavated a nest in the gravelly bank of an ungraded lot 
only three feet above the sidewalk of a prominent street, Denny Way, in 
Seattle. These birds were unsuccessful, but another pair, which enjoyed the 
