Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
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there is no resemblance whatever to a whisper in it, with these
birds. However, call it tentatively the whisper song.
Night roost. (_6:35 P.M. The thrasher is roosting in the same spot again.
I neglected to note into what tree the other bird retired until
too late).
Half-song. The next type of song is considerably louder, but is of the
same general character as the whisper song. In it, however, one begins
to catch recognisable phrases and imitations that are somewhat slurred.
In other words, one cannot say with strict accuracy that "that was
the song of the so-and-so", but "that sounded like the song of the
so-and-so". The bill remains closed. (Pintilogenium - don't waloox)
three-quarter song. The next type is between the foregoing and full-song. It is
filled with imitations and recognisable phrases, ingenious turns
and unexpected contrasts. It approaches full-song in volume. The
bird appears almost in an ecstasy and devotes itself to the song
single mindedly, with comical earnestness that makes one chuckle in
appreciation at each new turn. The bird pumps its tail up and down
often and will stand directly in front of me 2 to 10 feet away looking
directly at me and continue with no interruption whatsoever for
half an hour or more. Unfortunately none of my visitors has ever
heard this song, for it is a delightful performance. The birds will
not sing this way before visitors. The phrases previously recorded
in these notes are taken principally from this song, but it must not
be supposed that they they furnish, even with the imitations included,
the major portion of the song. Far from it. As a rough guess,
I would say that they make up not more than one tenth of it. The
remaining portion doubtless contains many imitations which I do not
recognise, as I know the calls and songs of but few birds. The
"filling" is full of rich tones, with tinkles, liquid sounds, rolling
r$, ells and some ens, and it must be admitted, some harsher
sounds; but these all add to the interest of the performance by