190 BIRDS THROUGH AN OPERA-GLASS. 
z-te eall, and a trill that is heavier than that of 
the golden warbler. 
LXVI. 
CHESTNUT-SIDED WARBLER. 
Wuen I first saw the chestnut-sided warbler 
he was flitting about the upper branches of the 
saplings in the raspberry patch, about three rods 
away, and I put down his yellow cap and wing 
bars as white, and did not even see the chestnut 
bands along his sides. I noted his pure white 
breast, however, and his loud, cheerful whee-he- 
he, so strikingly unlike the ordinary warbler trill 
or the z-ie tones of some species. The next day, 
after looking him up and finding what ought to 
be there, I discovered, by the help of my glasses, 
what, in fact, seemed little more than a maroon 
line beside the wings. But in a few days I found 
another bird whose chestnut sides were as the 
books would have them, and I felt like shouting 
Eureka ! 
Though I could not detect the nests that should — 
have been in the saplings bordering the clearing, 
I found plenty of mother chestnuts leading their 
broods about. They were among the pleasantest 
acquaintances of the summer. Such charming lit- 
tle birds as they are! 
My first hint of what was going on was the 
sight of one of the dainty little ladies peering at 
