96 BIRD FRIENDS 



FOOD CHART OF HAWKS AND OWLS 



(Based on number of birds eating various foods) 



The table shows that approximately seven times 

 as many birds had eaten mammal pests as had eaten 

 poultry and game-birds. 



The results of these studies were published in a 

 bulletin in which the economic status is briefly sum- 

 marized as follows : — 



