Concord, Mass.
1901
April 1
(No 3)
apparently seeking safe & comfortable perches for the
night. As nearly as I could make out they were
scattered over a space of an acre or more when they
finally became silent. Indeed I doubt if any one tree
sheltered more than a single bird.
  Large numbers of Robins - certainly not less than
forty or fifty - also went to roost tonight about
the edges of this opening. At first I thought they
had all settled in the pines but after it had become
so dark that I could not see distinctly I started a 
perfect cloud of them from a thicket of sweet gale
bushes on the edge of the little meadow near the
causeway. They rose all together, making as much noise
as a big bevy of Quail. As they topped the belt
of maples I saw them for an instant against the
sky & estimated the number at about thirty. There
were certainly a good many more scattered about among
the pines. Before it became dark several of the
males sang superbly. It seems to me that Robins
are unusually numerous here this spring. Certainly
this spring roost behind Ball's Hill has never been
nearly so populous before.
  Many small flocks of Red wings passed over the
hill towards the north just before sunset and I
saw one flock of seven Cow birds accompanied by
two Red wings going in the same direction.
  When I got back Gilbert told me that he had
just heard the quawk of a Night Heron repeated 
thrice & very distinctly. The bird was evidently
flying & seemed to come from the direction of
the Bedford heronry.
  No frogs or Hylas yet. They are very late this year.
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