Cambridge, Mass.
1905.
April 30
  The chorus of Robin voices began about 4 o'clock this morning
and lasted about half-an-hour without the slighted pause. At
least five or six birds were singing near our house and the combined
volume of sound was most impressive. After 4.30 I heard
only one bird at a time. Nor have I heard more than one
or two at evening of late the full chorus being simply confined
to the early morning hours. The birds have not begun roosting in
the lilacs as yet.
Robins sing in chorus only in early morning now.
  A Ruby-crowed Kinglet has been singing in the garden
since the 28th. I hear him at all hours of the day but
especially often between 8 and 10 A.M. The song of this species
may be best characterized I think by the adjective etherial.
Its quality is unique in respect to delicacy and spirituality.
It is also one of the most rapid of all bird songs. The
bird sings pretty closely to a thicket of hemlocks.
song of Ruby-crowned Kinglet
  At sunrise a Solitary Vireo sang for ten or fifteen
minutes at short intervals, in the Garden. Although all
its notes were normal I suspect that the bird is the same
as that which has passed the last two summers here (It was
the same for in the afternoon I heard it sing the other song.)
Solitary Vireo
  About 9 A.M. I found a Yellow-bellied Woodpeck
clinging to the trunk of the Austrian pine in the jungle
just below the cluster of holes that a bird of the same
species drilled last year. I think the bird seen to-day
was a female but I did not get a good view of it.
Sapsucker
  On Fayerweather St. about 10.30, I found a Brown Creeper
running up the trunk of an elm. There it launched out into the
air in pursuit of a flying insect returning to the same tree again.
Heard a Least Flycatcher singing at Jackson's Place.
Creeper. (Certhia) First Chebec