Lake Umbagog.
Cambridge River Marshes
1896
Aug. 14
(No 3)
  At 3 P.M. I started for Upton sailing across the Lake
and up river to the Mill as usual. I found the flock
of Purple Martins by the Lake House landing increased to
fifteen birds about one third of whom were old males.
They kept alighting on and flying from the tall dead
pine by the shore acting very like the Swallows at Lakeside.
With them were 20 or so White-bellied & a few Barn,
Eave & Bank Swallows. The Martins occasionally gave 
the spring warbling notes. Just before sunset the 
whole flock of Martins & Swallows began circling over
the river flying down & striking the water in quick
succession.
[margin]Purple Martins[/margin]
  I started back a little earlier than usual and after
getting a supply of water at the spring paddled to B. Point
where I took my supper in a little cove nearly opposite the
Lakeside landing. Soon after reaching this spot I heard &
saw Crows flying from tree to tree just inside the edge of
the woods but I did not suspect that there were more
than three or four of them until suddenly with a deafening
clamor upwards of a hundred rose and circled over me.
After beating me for awhile they realighted and became quiet
again but a little later they all rose together and crossed
the Lake to the opposite (southern) shore nor did they
return that night. Evidently I had blundered on their
roost and excited their apprehensions to such a degree
as to cause them to abandon it, at least temporarily.
[margin]Crow roost[/margin]
  Two or three Great Blue Herons alighting along the shores,
a Night-hawk wandering high in air over the Lake,
a Black Duck quaking in the distance after dark.
[margin]Herons.
Night hawk.[/margin]