marsh hawk, red shouldered hawk and sparrow hawk are beneficial, and 
that Cooper's hawk and the sharp-shinned hawk are the evil doers. ' The 
last two mentioned are the real culprits as they live chiefly on birds and 
chickens. All other hawks suffer for the sins of these two species. It 
is not meant by this that the beneficial species never kill birds or chickens. 
After U. S. Biological Survey. 
They do sometimes, but the great amount of good done in destroying: 
animals injurious to the farmer far outweighs the taking of a few chick- 
ens. Mr. Chapman says the two injurious hawks as a rule do not 
scream or soar but lurk quietly in ambush. It is sometimes a difficult 
matter to distinguish between good and bad hawks. The only safe way 
to give justice to whom justice is due is to kill only the hawks we 
10 
