Concord, Mass.
1911.
Oct. 31
(No 2)
[October 31, 1911]

they swept directly overhead, heading straight for the south west
and quickly disappearing in the distance over Punkatassett Hill.
I had no more than lost sight of them when another flock,
containing about 150 birds and pursuing the same course
at about the same elevation, followed them to be
followed in turn only a minute or two later by a
flock of about 50 Robins which were almost equally
high in air & similarly bound for [?] the southwest.
About 8.30 A.M., when at Ball's Hill, I saw two more
flocks of Robins one containing 30, the other 23 birds.
The smaller flock following the larger so closely that both
were in sight at the same time. All the Robins, unlike
the Blackbirds, were moving due south, not south-west.
All, too, were high and [in the] air and without question
performing a regular & extended migration. Whenever I see
them or the Crow Blackbirds thus engaged, at this season,
it nearly if not always happens in the early morning.