AVES 



239 



Fio. 272. Nest of a song sparrow in a currant bush. Photograph half natural 

 size. 



bringing caterpillars, grasshoppers, and Other insects for 

 the young. Forty per cent of the food of the adult con- 

 sists of insects. The song sparrow differs from the two 

 preceding in having the ventral portion of the body gray 

 shading to white and heavily streaked with darkest brown. 

 The vesper sparrow is easily identified by the partially 

 white outer tail quills very conspicuous in flight. Its nest 



