PROTECTION OF BIRDS 



469 



10* 20* 30* 40* Ktf 0* ft* K* *)< 



Cuckto. 



Chipping; Sparrovt 



Red-winged Blackbird 

 Honse Wren 



Downy Woodpecker 1 



4* 

 Song Sparrow I 



77* 



H69* 



368* 



Mourning Dove. 

 Meadowbrk 

 Rose-breasted Grosbeak 



Bobwhite- 



Baltimore Oriole 



168* 



English .Sparrow. 

 Crow Blackbird- 



Red-beaded Woodpecker 



Blue Jay. 



Crow 



Catbird 



Cedar Waxwimg 



FIG. 183. Food Chart of 25 Common Birds. 



The upper black bar represents food to the bird's discredit (grain, cultivated fruit, 

 beneficial insects) ; the lower, food to the bird's credit (l I injurious insects ; 



vmim>M weed seeds). The length of line is based on the percentage that these 

 foods form of the bird's total food, as determined by the Bureau of Biological 

 Survey. 



