1902.
April 6
  Forenoon clear & dead calm.; afternoon cloudy
with chill east wind.
  I spent the entire day in the woods on or
near Ball's Hill rambling slowly from place to 
place and giving most of my attention to trees &
birds. The latter sang rather freely at sunrise
and well into the forenoon but I heard nothing
of any particular interest. I saw no less than
ten Black Ducks, two pairs and a flock of six.
All were flying rather low down and directly
northward. As the flock passed over me one or
two of the drakes kept up a continuous low, wheezing
quacking (the voice of the drake is not really a 
quack at all.)
  For an hour or more at about noon the Leopard Frogs
were croaking by hundreds all over the Great Meadows
producing a volume of sound that equalled anything
I have ever heard from them here before. It is the
first time this season where they have been in
really full cry.
  I was mistaken in noting the other day that
the Wood Frogs had about ceased their spring
concerts for this year. They were croaking by scores
this afternoon in both of the little ponds just
behind Ball's Hill. 
  Herbert Holden told Gilbert that on his way down river
this morning he saw a Great Blue Heron & three Doves.
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