Concord, Mass.
1901
March 25
querk-er-ees of Red-wings perched on the tops of
maples along the river were nearly out of my hearing
for many minutes at a time. The number of 
Bluebirds that I have heard today is hard to estimate
but I should not be surprised if might be safely put
at a dozen. The doubt, of course, is, as to how many
of those which I heard were different individuals.
There was a Phoebe chirping near the wood shed &
I heard one in full song this morning near the
West Bedford Station.
  At about sunset I saw a continuous stream of
Robins, hundreds of yards in length and containing
by actual count forty six birds, coming from the
southward high in air and descending into the
dense white pine woods which cover the south end
of Pine Ridge. They were evidently going to roost there.
I went in among the pines and startled birds from
nearly every tree getting the impression that there were
many more assembled than I had seen flying in.
There was no singing but I heard other Robins in
full song elsewhere. I have never known Robins to
roost in these woods before nor have I ever before
seen so many congregated at a Spring roost.
A large
spring
Robin roost.
  As twilight was falling two Black Ducks passed
over Ball's Hill towards the westward and a flock
of five birds which were probably Gooseanders, although
they looked too dark-colored, went overhead in the
opposite direction a few minutes later.
Ducks
  No Frogs or Hylas yet.
20