89
Concord, Mass.
1913.
Aug. 26 
to
Nov. 13
(No 40)

  100. Buteo borealis (?). Late in the afternoon of November 2 [November 2, 1913]
a large, slow-flapping Buteo which I took to be a Red-tail
flew from a tall oak as I was passing the northern base of
Punkatasset Hill. Unfortunately it was seen only on wing, at
a  distance of more than one hundred yards, and silhouetted
against the dazzling light on the sinking sun so that I
could not make out its coloring which looked very dark and
indeed almost black - as would that of almost any bird viewed
under similar conditions. It was certainly not a Red-shouldered
Hawk but may possibly have been a black Rough-leg [Rough-legged Hawk] although
its manner of flight was, I though, characteristic of B. borealis [Buteo borealis].

  101. Buteo lineatus. - Noted at the Farm on August 31 [August 31, 1913],
September 11 [September 11, 1913] & 15 [September 15, 1913], October 9 [October 9, 1913]. On all but one of these occasions
its wild, ringing cries were heard. On September 6 [September 6, 1913] two birds
(one adult, the other young) were in sight at once from
Ball's Hill - perched on poles in the meadow just across the river.