Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
fell to the ground, but at least one lodged in a crotch. (The
live oak, which has very dense foliage, has its inner twigs beneath
the canopy," shade killed". In the course of time these drop off, but
they may persist for years. They become very brittle and at a certain
stage may be easily broken. The smaller ones form a large proportion
of the main structure of the thrasher nests at this place. They are
either broken off or picked up from the ground. Being, as a rule,
crooked, with numerous small forks, they make a strong structure even
when in a rather loose mass, as in the thrasher nest)
B calls loudly
as I leave.
I left in about 5 minutes. When I was about 20 feet away from the
tree Brownie called twice in rich tones and in full voice. ( I do not
deduce anything from this!) It was like the opening phrases of the song
of the Black-headed Grosbeak, but deeper. I would not call it an im-
itation.
10:45. At 10:00 I went to the glade. Both birds came at once, both
using the same phrases which I cannot approximate closer than to say
they were little, thin, high-pitched, drawn-out squeaks ending with deep
gurgles. (Again illustrating the tendency for both birds to switch
to the same phrases simultaneously) I gave them both worms--little
competition between them, other than not very strenuous efforts to
get the worm first . Greenie at one time could be plainly seen
trying to focus both eyes on a worm in the tip of his own beak. It
appears that he can do this. At such a time it is quite evident
that the eye-balls are not spherical. They both climbed up the old
Tendency
to use
same phrases
by B&G.
oak and three-quarter song came from it. Then several loud calls:
latest
yer-r-rk--yer-r-rk, be-voor. By kæmt precedent, they should go next
to the "dorm" (dormitory tree). I waited for a quiet interval and
then went there. Sure enough, Brownie six feet from her night perch
*+
arranging loose twigs aimlessly about 9 feet above the ground and
10 feet from my head. She then "rested" and answered when I talked to
her. Then over to her nightwig with more moving about of loose
G looks
cross-eyed
at worm.
Eye-balls
not
spherical.
Calls.
B again
"nesting"
*Later measured--10 ft.