ENEMIES OF PLANTS. 



309 



ogy at Washinoton shows that 98 pv.v cent, of 

 the f(H)(l of the wren consists of injurious in- 

 sects. 



Many other birds of wide geographical distri- 

 bution are recognized as the farmer's friends; 













.^^^^.^^^^imf- -^^: '^ 









-/i#^ 



■"^/tA- ^...^^%r^/"' 



■v 



'a/ 



FIC. 105. — HOUSE WREN (Troglodytes aedofCs. 

 (United States Department of Agriculture.) 



among them are the robin, oriole (Fig. 117), 

 mocking-bird, brown thrasher, chickadee, and 

 catbird. 



But there is another class of birds which is 

 much persecuted because the farmer errone- 



