110 



AMERICAN ORNITHOLOGY. 



now dying down and then again renewed with greater vigor. Their 

 anger is alternately expressed by an emphatic "chack, chack," or a long, 

 shrill, whistling "zee-hee." For those who consider all birds strictly 

 in accordance with their economic value, I might say that Red-wings 

 are, like a great many other things, very valuable in some sections of 

 the country, while they are equally destructive in others. They de- 

 stroy large numbers of cut worms and other injurious insects, eat 

 quantities of seeds of obnoxious weeds, and in some sections of the 

 country feed freely on the hosts of locusts that invade the fields. 



FEMALE REDWING. 



