Concord, Mass.
1902.
July 20
  Cloudy and cool with fine rain & fresh E. wind.
  I went to Concord by electrics this forenoon
and spent the night at the cabin. The only birds
heard singing at or near Ball's Hill were a Song
Sparrow, 2 Grass Finches (one near W. Bedford station,
the other in Pine Park), a Cat-bird, a Red-eyed Vireo,
and a Quail (on the West Bedford side of the river.
At the farm I heard a Red-eyed Vireo, a Yellow-throated
Vireo, a Tanager, a Chippy (sang only once), a Field Sparrow
(singing brokenly & faintly), an Indigo Bird (in full song
for an hour or more) a Black-billed Cuckoo, and 2
Quail (near together in the blueberry pasture across the road).
Birds still in song
  In a potato patch near the barn at the farm I
found no less than four Rose-breasted Grosbeaks, two
adult males still in full plumage and two females,
feeding on the larvae of the "potato bug" with which
the vines are badly infested.
Rose-breasted Grosbeaks feeding on potato bugs
  Ten or a dozen Bluebirds, a somewhat greater number
of Robins, several Chippies and Field Sparrows, one or two
Song Sparrows, a Kingbird accompanied by two or three
young, and two young Orioles were flitting about among
the bushes in the blueberry pasture or in the neighboring
field. In Bensen's pasture I saw upwards of a dozen
Chippies hopping about on the closely-cropped turf.
Birds collecting into flocks.
  Through the evening (ie from 8 to 10 P.M.) Bull Frogs
bellowed at long & infrequent intervals. I heard no other
marsh voices & the silence was sometimes unbroken for 15 or 20
minutes at a time.
Frogs nearly silent.
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