It keeps invariably near the tops of the highest trees
whence it occasionally darts out after passing insects ....
In rainy or dark weather they came in numbers from
the woods to feed among the thickets of low firs and
spruces in the pastures. Here they spent much of their
time hanging head downward at the extremity of the
branches, often continuing in this position for nearly a
minute at a time. They seemed to be picking minute
insects from under the surface of the fir needles. They
also resorted to a thicket of blossoming plum trees directly
under the window, where we were always sure of finding
several of them.