11

Concord, Mass.
1916.
April 4
to
July 9
  Wood Frogs, as has been noted, were croaking freely on
April 5 [April 5, 1916] but I did not hear the voice of the first Hyla until
the 11th [April 11, 1916] or that of a Garden Toad before the 29th [April 29, 1916] - an exceptionally
late date for the last-named species to begin its musical trilling.
Last spring and this there were comparatively few Hylas
peeping in our neighborhood - never, indeed, enough to unite
their high-pitched voices in the ringing choruses that used
to rise at evening from every swampy hollow, well nigh obliterating
all other sounds. Nor did I hear more than an occasional
Bull Frog this year, during my infrequent visits to the
river near Ball's Hill & elsewhere, while I cannot
remember hearing a single Leopard Frog or Pickerel Frog.
Green Frogs and Tree Toads were no less common and
vociferous than usual, in the neighborhood of our farm
house, at the height of their spawning season when
several pairs of the latter species frequented a small artificial pond
close to the old wall directly in front of the house