65
Concord, Mass.
1913.
Aug. 26
to Nov. 13
(No 16)

40. Geothlypis philadelphia. - About 9 A.M. on September 28 [September 28, 1913] I was
standing at the edge of our raspberry patch when a bird
began chirping in dense shrubbery bordering the old
wall that separates the raspberries from the lane.
Although it uttered only a note not unlike that of a
Maryland Yellowthroat I suspected at once that 
it was a Mourning Warbler which presently proved to
be the case when, impelled, apparently, by insatiable
curiosity, it showed itself at the edge of the thicket
flitting about among the branches of an almost leafless bush
where, in bright sunlight & scarce thirty feet away, it
permitted me to watch it for at least 2 minutes
through my glass. It looked like an adult [female] in
autumnal plumage having a good deal of ashy on
the sides & top of the head but the entire under
parts, including the throat and breast, were clear
& almost perfectly uniform yellow. It chirped
excitedly, rapidly & continuously for fully a minute
and jerked or flirted its tail a good deal. At
length it flew down into the thicket where I felt
sure of finding it again when, a few minutes
later, I returned to the place with Glover M. Allen
& several youths interested in birds who happened to
have been left in the house. But we sought it
quite in vain, not only there but elsewhere in
various similar places in the neighborhood.

41. Geothlypis trichas. - In September - up to at least the 24th,
when the species was last noted - one or two birds
frequented thickets close about our old farm house,
sometimes visiting a bed of zinnias in front of the barn.