Concord, Mass.
1911.
Sept. 26
[September 26, 1911]

Bats in shed loft.

  As usual the shed loft at the Farm has been
frequented all summer by Bats of the same interesting
species which I have found there ever since I bought the
place fourteen years ago. They are believed to winter in
Florida. Certainly they appear here rather late in
spring and disappear early in autumn. The dates of
their arrival and departure this year are as follows: -
May 4 [May 4, 1911]. Three in the shed loft. (none there April 26 [April 26, 1911] when it was
last visited by me.
May 5 [May 5, 1911] Six in the loft all bunched together
May 6 [May 6, 1911] Six in the loft all bunched together
May 7 [May 7, 1911] Six in the loft all bunched together
May 9 [May 9, 1911] Fourteen in the loft all bunched together
June 16 [June 16, 1911] Eighteen in the loft, all apparently adult.
Sept. 13 [September 13, 1911] Eight in the loft
Sept. 23 [September 23, 1911]. Three in the loft
 Sept. 25 [September 25, 1911] One in the loft
Sept. 26 [September 26, 1911] None could be found anywhere in the loft to-day.
If the one found there yesterday really migrated last night
he chose a peculiarly unfavorable time for such a journey
for a heavy thunder storm which began at 5 P.M.
was followed by almost continuous rain lasting until
after daybreak this morning.