Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
took from hand. B shortly gilded down to the ground about 50 feet
to the north east of the tree and Bb promptly followed. B went up
about 5 feet in a sapling oak and continued full song--an unusually
low point for anything but subsong. Two more thrashers came, dug
about, then went to B's tree, one of them climbing up and perching just
below him. B' then changed to a miniature of the full song that
he had just been singing, using the same articulate phrases. This
is also new. He lowered his head and began pecking at the twigs
below him. The other bird remained quiet for several minutes, look-
ing up at him, then came down and went to digging. B then went off by
himself and sat in the open on the ground in the old-man patch on the
east side of the glade and sang subsong continuously for about 20 min-
utes without stirring from his tracks. In the meantime the other thr
three were digging and skylarking under the acacias along the north
line near where I sat, the youngsters making up evidently for the play
time lost by their having been separated from the beginning. Nova(?)
left the group and sailed by me down to B and approached him as if
actuated by curiosity only. B ceased his subsong, lowered his head
toward the ground, crouched, puffed out his feathers and spread his
tail, becoming "stiff all over" and tapped rapidly upon the ground
with short, rapid blows in "bursts" of 5 or 6 at a time. Nova
watched curiously from about 2 feet away edging about to get a better
look at him, but otherwise not responding in any way. Most of the ti-
time B was back or side toward Nova, never appearing to look at her
directly. He was voicing soft, inarticulate sounds and shifting his
feet about without changing position materially. This kept up for
several minutes, when one of the youngsters sailed down to join the
group and B's antics gradually ceased. This is the first display
of this sort witnessed here. The three birds then wandered about
amicably in and out of the bushes, digging and mildly chasing each
other, then went into the glade. Bb had remained not far from me,