GREAT VALUE OF PERCHING BIRDS 



259 



insect food, and can subsist on no other kind. Next in im- 

 portance, and for the longest period, perhaps, come seeds 

 and grain, especially the seeds of weeds that are a pest to 

 the farmer. As a rule, fruit is taken in its brief season more 

 as a dessert than as a staff of life. 



Sea.pula.rs 



Secondaries 



sS"fbrc7ica.d. 



.Zesser 

 f.. Greater 



) 



Coverts. 



THE PARTS AND PLUMAGE OF A PERCHING BIRD. 



A very few species, like the crow, magpie and jay, eat meat 

 whenever opportunity offers it, and welcome the discovery of 

 raw meat or eggs. 



The great value of the perching birds lies in the enormous 



quantities of insects which I hey consume as food. 1 These 



1 The Biological Survey of the United States Department of Agriculture has 

 published many important bulletins and shofl papers <>u the food habits of our 



hints, with especial reference to the species either most beneficial or most harmful 

 to the farmer and fruit-grower. A list of those now available, and the terms on 

 which they are procurable, will be furnished by the Department upon application. 



