Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
forming the east boundary of the lawn. All three foraged industriously, at times ceasing this activity to pose and talk. There was some chasing (without anybody being caught and no chase being pushed to a conclusion) much as members of Brownie's broods when with me in the glade chased each other and used me as station in their play. (One bird would use the top of my head as a place to be defended from the others). There was more or less running back and forth across the lawn with a tendency for 4 thrashers ( I do not know where the 4th came from) to work toward the N.W. in a loose group.
Meanwhile the sole singer in the pine to the east came down to scrp and foraging without actually joining the others. 5 thrashers now in plain sight. The newcomer, on invitation, came along the top of the wall and got worms from me. He then climbed the acacia east of the cage, sailed down toward Neo's sanctuary and was immediately followed by a sixth thrasher, running along the ground.
Six thrashers were now accounted for. The other four wandered off, loosely grouped, into the brush on the slope north of my north fence, apparently in amicable relationship. By 9:30 nothing could be seen or heard of them.
The other two seem to have continued on to the south west, where loud song soon developed in what is regarded as neutral territory between the domains of Brokenwing (at the Sampsons') and Neo here.
A"listening and looking" survey of ten minutes duration about the grounds beginning at 10:20 failed to reveal the presence of one thrasher, near or far.
It may be significant that, with four instead of three, thrashers on the ground together, there was not seen this morning the solitary hide-and-seek game of the odd bird of yesterday.
Rhody still moulting. I picked up a freshly moulted central rectrix of Rhody this morning. Except for slight fraying of the white spot at the tip, it was smooth, glossy and unworn.
Rhody's mice presented him with still another batch of youngsters during the night!
He has not been seen this morning. (10:35, temp. 69°).
10:45. Neo and mate home again. The former in the court singing short songs at long intervals; the latter at the oval lawn. There are no outsiders to be seen or heard, in contrast to yesterday.
I now left for town. Returning at noon, I found the place ringing with thrasher song: one bird in the N-pine; one near the entrance; another to the north some distance away. The two first mentioned sang almost constantly, full power, and it was noted that their songs were much alike. Evidently the same two birds previously observed to have songs almost the same--a rare phenomenon here. This kept up for about three quarters of an hour, then song ceased.
About 2 P.M. Neo began song from his inner sanctum, then shifted to the oval lawn to feed. As he was going to the N-pine I caused him to change his mind by offering worms. After eating he sat in a bush ten feet from me and sang for 20 minutes. I listened to every nuance. This song was like none heard from him before. It varied from the tree-toad motif to the high peer, peer, peer heard only once before at this place and that was years ago.
The California thrasher constantly varies its song; new musical phrases and "words" are constantly added and old ones dropped: sometimes never to be heard again from the same individual and rarely from any other.
From 2 o'clock until about 4 Neo seemed to occupy his territory alone and he was not heard to talk to a mate when near me.