1892
June 13
(No 5)
Concord, Massachusetts.
Mass.
Concord.- copulating. It was a singularly passionless
union in keeping with the birds' generally calm,
phlegmatic demeanor.
  On reaching the Buttricks' I at once heard a
Bluebird [delete][?][/delete] warbling with peculiar fervor and frequency.
It kept it up almost unceasingly until nearly
dark and the people at the house told me
that it had been singing thus during the entire day.
[margin]Bluebird[/margin]

  Robins sang freely at sunset and after dark
or rather after the moon rose I heard Black-billed
Cuckoos at frequent intervals far into the night.
Usually the song was much abbreviated & sometimes
only the wor-r-r-oo was given in a low, [delete]sleepy[/delete] dreamy
tone as if the bird were calling in its sleep. I
have never, so far as I can remember, heard any
sound whatever from the Yellow-billed Cuckoo at
night. That I do not hear him here these
warm, moon-lit evenings is fairly strong proof
that he seldom if ever sings after dark for at
least one pair haunt the trees about the house
and are constantly to be heard during the day
[margin]Black bill Cuckoos
singing at night[/margin]
[margin]Yellow-bill Cuckoo
does not sing
at night[/margin]