1892
April 27
Concord, Massachusetts.
Mass.
Concord. Morning clear and warm. Afternoon
cloudy, threatening rain. Strong S.E. wind in P.M.
  To Ball Hill at 9.30 a.m. taking my
rowing boat and loading it deeply with small
trees & shrubs gathered yesterday. While thus
engaged I heard Red Crossbills in the orchard.
On the way down river heard a Savanna
Sparrow singing near Hunt's Pond. Nothing of
interest at the hill today. Have neither seen nor
heard the Carolina Doves there for a week.
1892
April 28
Cloudy with strong S.W. wind and frequent light
showers.
  To Ball's Hill at 2 P.M. sailing down in my Rob Roy.
In the woods on the north side of the hill near
the little pond I came upon a flock of a dozen
Warblers, two Mniotilta varia, the remaining ten all
Dendroica hypochrysea. I have not seen any of the
latter before since the 18th. This must be a second
flight wave. There was a Phoebe with three Warblers.
They all kept close together & low down among the
bushes. None sang.
  While I was on the top of the hill a Pigeon Hawk
came overhead and for several minutes circled 
with swift, powerful flight (not sailing) against 
the white sky. It is a miniature Peregrine in every
respect.
[margin]Pigeon Hawk[/margin]
  As I paddled up river in the twilight the Hylas
and Leopard Frogs were in full blush . A single
Black Duck came over the meadow & scaled down but
did not alight. A Bittern pumped a few times.