34 EVERYDAY BIRDS 
simple line of pure melody, one may say. You 
must hear it for yourself. Sometimes the bird 
gives it out double, so to speak, catching it up 
again just as he seems ready to finish. The tone 
is the clearest of whistles, and the whole effect is 
most delightful and soothing. It is worth any- 
body’s while to spend a season or two in bird 
study, if only to learn this and half a dozen more 
pieces of our common wild-bird music. 
The field sparrow’s times of arrival and depar- 
ture are practically the same as the chipper’s. 
Neither bird is hard to see, or very hard to dis- 
tinguish ; a bit of patience and an opera-glass 
will do the business ; though you may have to 
puzzle awhile over either of them before making 
quite sure of your knowledge. In bird study, as 
in any other, we learn by correcting our own 
mistakes. 
