20
Spring and early summer.
Concord, Mass.
1913.

33. Wilson's Black-cap. A [male] singing in thicket by river bank at
Ball's Hill on May 9 [May 9, 1913] and another in our Berry Pasture on the 21st [May 21, 1913].

34 Canadian Warbler. Arrived May 17 [May 17, 1913]. Heavy flight of north-bound
migrants on May 25 [May 25, 1913] when I noted at least 8 males in full song
at the Farm, mostly in the run. On this same date large numbers
were met with in Lexington & elsewhere by Faxon & others. 
During the month of June there was, as usual, a [male] singing
in Ball's Hill Swamp and another in Davis Swamp.

35. Redstart. - First seen May 8 [May 8, 1913] at Farm where two pairs settled
down to breed. One male sang regularly in the oaks behind our barn
the other in those below the house next the road. The mate of the
former bird began a nest in a plum tree by the lane on May 25 [May 25, 1913].
A few days later I saw her sitting in it apparently brooding eggs. Something,
probably a Jay but possibly a Wren, raided it shortly afterward & tore
out the lining. Where this pair nested a second time I failed to
ascertain. Pierce & his men finished spraying all the trees & shrubbery at
the Farm on June 13 [June 13, 1913]. I heard both male Redstarts singing in their
ancestral places the next day & again on the 15th [June 15, 1913]. After that I
heard one on the 20th [June 20, 1913] & 24th [June 24, 1913] & saw an adult [male] by the roadside near
the Ritchie place on July 2 [July 2, 1913]. Whether or not they were affected by the
spraying I could not make sure but it is to be feared that if
some of them were not poisoned by it they were at least induced
to leave before their usual time because of the resulting scarcity of
leaf eating insects. The only other breeding station in our neighborhood
that came to my notice was on the river bank opposite Pad Id. [Pad Island]
where I heard a [male] singing in dense white maples on June 14 [June 14, 1913]. As
far as I was able to observe there was no flight whatever of
North-bound Redstarts this spring at the Farm or at Ball's Hill.