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THE SUMMER WARBLER. 
77 
front of the window is an open field with a group of five large apple trees, 
all within twenty to fifty feet of the house. These, with the trellis and 
portions of the grape-vine it supports are vividly mirrored in the 
window, as well as the general landscape, and of course the bird himself 
whenever he visits the trellis. But his own reflection does not seem to 
be the point of attraction, as he wsuad/y strikes the pane two or three 
feet above the point opposite his perch, but sometimes dives down from 
the upper bar of the trellis to the lower panes of the window. Occasion- 
ally he flies directly from the apple trees against the window, but 
generally first alights on the bars of the trellis. For several days his 
visits have begun with early day-break, and have been continued 
throughout the day till after sunset, he rarely leaving the window for 
more than a few minutes at atime. He sings almost constantly. 1 
have seen him strike the window-panes as many as ten times in a 
minute, barely pausing on the trellis between each plunge, long enough 
to utter with much energy his shrill little song. These proceedings, he 
will sometimes repeat for several minutes, then fly to the trees and 
return again a minute or two later, usually with a canker-worm in his 
beak obtained from the apple trees. This he usually bruises on the 
trellis-bar and swallows at once before diving at the window, but not 
unfrequently makes several plunges at the window with the worm in 
his beak. He strikes the window pane with such force that the clicking 
of his bill and feet against the: glass may be heard to a considerable 
distance. He usually strikes the large pane a foot or two from the top, 
fluttering upward to the top, when he returns to his perch. The upper 
panes receive the chief part of his attention, but he not unfrequently 
descends to the lower ones, which he follows upward in the same man- 
ner to the top of the lower sash. He takes little notice of people 
