Lake Umbagog.
1903.
June 14
  Clear and cool with S. E. wind.
  Soon after breakfast I started for a walk along
the road that leads eastward from Lakeside. On reaching
the first piece of woods I stopped for a moment to look 
at a plant that grew by the roadside. As I was standing
there I became conscious of the song of what I took, at
first, to be a Red-eyed Vireo, coming from an aspen nearly
over my head. It did not especially attract my attention at
first, but presently it struck me as being not quite normal
and the next instant it occurred to me that it might 
come from a Philadelphia Vireo. I now gave it careful
attention and the longer I listened the surer I became
that the bird was V. philadelphicus. His song although
generally similar to the Red-eye's was less vigorous, flowing
and varied the notes being given at somewhat wider intervals
and with less emphasis. There seemed to be only three really
different notes, a pu-e-e exactly like that of olivaceous, another
note, closely similar to this and a ser-wee-e which, as
I dimly remembered, I had learnt to consider characteristic
of Philadelphicus when I had repeated opportunities of 
studying its song in this same locality in 1879.
Philadelphia Vireo
  On the present occasion I spent at least fifteen
minutes looking for the singer before I saw him. There was
no wind whatever at the time and the leaves of the aspen
hung limp and motionless. Had any bird, however small,
hopped or flitted among them he must have agitated
the foliage. Yet the song came almost unceasingly from
somewhere in the upper part of the tree. After I had
walked around it several times, moving very slowly
and craning my neck upward until it ached intolerably,