400 RELATIONS OF BIRDS TO AGRICULTURE 



Out of one hundred and twenty-four stomachs examined by the 

 United States Department of Agriculture, seven contained poultry 

 or game birds, thirty-four contained other birds, fifty-seven con- 

 tained mice, twenty-two contained other mammals; seven con- 

 tained reptiles; two contained frogs; fourteen contained insects, 

 the contents of one were undetermined, and eight were empty. 



V 



FIG. 392. Great horned owl. (After Fuertes.) 



Dr. H. B. Warren examined fourteen stomachs with the following 

 results: Seven had only field mice in their stomachs; three, frogs; 

 two, small birds (warblers) ; one, a few feathers, apparently of a 

 sparrow, and fragments of insects; one, a large number of grass- 

 hoppers, with a small quantity of hair, evidently of a young rabbit. 

 Sparrow Hawk (Plate 3, Fig. 13). This is our smallest and 

 most beautiful hawk. It is common in fields and along roadsides 



