BIRDS AS RELATED TO AGRICULTURE 



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Nesting sites and food for birds. In addition to provid- 

 ing trees and shrubs as nesting sites for birds, nesting boxes 

 placed in sheltered places will generally attract such birds 

 as wrens and bluebirds. The practice of feeding birds in 

 winter often encourages them to become permanent residents. 

 At least a dozen different kinds of birds spend the winter in 

 the Northern States. During severe weather, especially 

 when the ground is covered with snow, these birds have a 



Nesting sites for birds. Two martin boxes. 



hard time to get enough to eat. Providing food at such times 

 would prevent many from starving. 



There are two rather common enemies of song birds that 

 should be held in check. One is the English sparrow which 

 is found almost everywhere. It generally succeeds in driv- 

 ing other birds away, and, as far as is known, does little by 

 way of compensation. It should be trapped or poisoned 

 during the winter. At this time there is the least danger of 

 injuring other birds by these methods. A good summary of 



