Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
All of these birds--Rhody less frequently than the others--go up
into the tree where there is the greatest concentration of thrashers.
The hummers buzz over their heads and dive down at them; the jays
sometimes are quiet, but sometimes make a frightful din and act as
if there were a snake present.
At one time today, also, two tanagers went into the tree
occupied by one of the singers, but as they foraged there, I think
they were merely seeking food. (They caught insects, which I could
see in their bills).
Late in the afternoon, at which time R is usually able to
negotiate a large mouse successfully, he was given a big one
It was a tough one that took a lot of killing followed by
much subsequent "limbering up". R then undertook manfully to swallow
it, but had to give up ( or preferred to) disgorging it hastily, then
to my surprise, ran swiftly to the cage and got a piece of meat.
Hr again slept in the old house.
August 27th.
The day again opened with thrasher song, mostly by one bird,
but others were scrapping not far away. About 8:15 there
was no song, but 5 or 6 thrashers could be glimpsed down on the bac-
charis slope to the north. Loud song now came from the old oak and
a thrasher was occupying the highest snag singing with back to the
breeze (which ruffled his feathers) facing north, where the other
thrashers were. This seemed to offer an opportunity of getting some
light upon the reactions of the other thrashers (about 100 yards
away) to the song of a single bird presumably singing from his own
territory. (Although I can not say that this bird was Neo). (One
"theory" at present is that all this is a manifestation of territori-
ality). After about ten minutes of song, an answer came from the
north and a thrasher began to sing from one of the pines by the north
fence. For several minutes the two birds sang alternately, then the
bird on the oak dropped to the ground and ran toward the pines, stop-
ping however, in the open space by the shop north wall. Here he walked
about stiff-leggedly with bill in the air and the other bird joined
him, both birds walking about in the same attitude talking and sing-
ing--the song being of about the order of quarter song, with no
harsh notes. There was no clash; the birds did no circling about
each other and never approached closer than about 3 feet and then
only in passing. A third thrasher now came from the north and all
three went up into the pine at that place and maintained a continuous
low conversation mixed with undersong.
(Rhody now appeared upon the scene escorted by several humming-
birds who dived down at him, but never struck him. (Julio says there
were 5). He ignored them completely, paused as if to listen to the
thrashers, then accepted an invitation of J's to have a mouse, there-
after going to a lath screen over an ailing rhodendron to preen. I
went to him, stood three feet from him and exhausted my road-runner
vocabulary upon him. He listened with every appearance of respect-
ful attention, but made no verbal response and fell to pulling
"dandruff" off of his feathers).
The thrasher tea-party was still in being as I left to make
this record. (9:50 A.M.) It was a much less vociferous affair than
yesterday's with fewer guests.
10:30. Everything quiet thrasherwise; but, based on past
observations, this does not always mean that the birds have dispersed,