Pesticides are applied chiefly by plane in large-scale oi*>rations. and the effects of such applications on fish and wildlife 

 are of great interest to conservationists and wildlife management agencies. At top. biologist and pilot are reviewing 

 flight plan to be followed in experimental spraying; and at bottom, left and right, biologists are banding or otherwise 

 marking birds and mammals for appraising effects of the pesticide. (Photos by Ohio Cooperative Wildlife Research 

 ('nit. top ; James O. Keith, left bottom ; and Van T. Harris, right bottom) 



48 



