BIRDS 



821 



or entire lives in the water are preyed upon by aquatic 

 birds."* 



But birds are useful in other ways besides destroying 

 harmful insects. There are many kinds of birds that 

 live principally on the seed of weeds, and in this way 

 destroy great numbers «>t' weeds which would other- 

 wise grow up to the hurt of farmers. Then there sw 

 still other kinds that make their living on field mice, 

 rat.-, larger insects — grasshoppers, etc. Let us consider 

 the work done by each of these classes of birds, begin- 

 ning with the insect-eater, or insectivorous bird. 



Questions 



1. How are birds received when they come in the spring? 

 2. What harm do birds do? 3. What good do they do? 

 4. Into what groups are birds divided? 5. What are insecti- 

 vorous birds? 



wrt of Conn. Board of Agr., low, p. 78. 



