May 
in their powers of flight, sometimes covering a 
thousand miles in twenty-four hours, and never 
resting, it is said, except in their roosting-places 
(chimneys or hollow trees), where they do not 
perch, but cling to the walls, partially supported 
by their stiff tail. In flight they can be distin- 
guished from the true swallows by the apparent 
absence of a tail, it being extremely short. They 
live upon such insects as are to be caught on the 
wing, and one might infer that they had con- 
tracted their sooty-brown color by contact with 
chimneys for several generations, until it be- 
came ingrained. 
The last great ‘‘ wave’’ of the season came 
on the 22d, bringing only a single new species 
—the bay-breasted warbler ; but for a time the 
woods were full of the Canada, black-poll, 
Blackburnian, magnolia, Wilson, black-throated 
green, summer-yellow, Maryland yellow-throat, 
wagtail, redstart, and black-and-white creep- 
ing warblers. 
Of the twenty-four warblers that I found in 
the Ramble this spring, more than a passing 
word is due to the ‘‘ chestnut-sided,’’ as it is 
very prettily and curiously marked with chest- 
nut, yellow, white, and black—the chestnut 
conspicuous on each side of the breast, and the 
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