very clear like the tinkling of a bell. They open with a few exquisitely 
modulated whistles, each brighter and a very little louder than the pre- 
■ceding, and close with a sweet trill.'" 
After U. S. Biological Survey. 
The field sparrow is a sweet singer and many are the variations in 
its song. His food is approximately forty per cent, animal and sixty 
per cent, vegetable matter, the former consisting chiefly of injurious 
insects, and the latter chiefly of weed seeds. 
40 
