196 ' 
IOWA ACADEMY OP SCIENCE 
Unlike species which feed on more noble quarry, and which must of necessity 
spread over a considerable area in order to secure it, these hawks doubtless 
find food in sufficient quantity to supply their needs within a comparatively 
limited area. 
The specimen shot was very fat and, if the remainder of the fiock had fared 
as well, the mass of insects destroyed by them daily must have been con- 
siderable. 
