428 



ELEMENTARY BIOLOGY 



often destroys the eggs and sometimes even the young of 

 birds, and does nothing to compensate for this damage. 

 These animals should therefore be killed, to give the birds a 



Cedar waxwing (A mpelis cedrornm) 



Crow (C&rvus american-us) 



Red-headed woodpecker (Melanerpes 

 erythrocephalus) 



Great blue heron, or crane 

 (A rdea herodias) 



FIG. 226. A bird rogues' gallery 



The cedar waxwing destroys fruit and disperses weed seeds. The crow destroys grain, 



fruit, useful insects, and the eggs of useful birds. The red-headed woodpecker destroys 



cultivated fruit. The blue heron eats fish and frogs 



better chance. The weasel, the skunk, the fox, the raccoon, 

 and other mammals sometimes kill birds or eat their eggs ; 

 but as they do not feed exclusively or largely upon birds, they 

 are not to be considered serious enemies. 



