Concord, Mass.
1901.
May 7
  Cloudless with light S. E. wind. The warmest day thus far.
Ther. rose to 83 degrees.
  Arrivals. Oven bird 1 in full song, Nashville Warbler 1 in full song, Yellow Warbler
1 in full song (Concord village, Purdie), Chimney Swift heard at 6 P.M.
  Great increase in numbers of Black & White Creepers, Black-throated
Green Warblers, and White-throated Sparrows.
  Spent forenoon at Ball's Hill where the Nashville Warbler &
Oven bird were noted. There was also a Solitary Vireo
in full song and in the afternoon I saw another in
the orchard at the farm.
  At about 8 A.M. a Bald Eagle with white tail but
apparently dark head appeared over the Hill soaring in
circles at an immense height - fully 5000 ft. I should
say for the bird looked scarce larger than a Pigeon.
With it was an adult Herring Gull which kept rising
above and stooping down at it uttering its shrill
cleur, cleur - cleur - cleur at each swoop. The Eagle paid
no apparent attention to its attacks but continued to
swing around and around in graceful circles. 
  Lawrence's son told me to-day that his brother caught
a young Great Horned Owl in the pine woods by the
river (where I found the two young in 1899) last Sunday
(May 5th). It was out of the nest & perched in a
tree but still in the down & unable to fly. He has it
in a cage at the farm.
  Vegetation advanced rapidly to-day but it is still very
backward. The white willows showed green foliage this evening.
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