Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Zonotrichia leucophrys
July 9 Kaiser Pass Meadow, 9100 ft., Fresno Co., Calif.
678 was chipping in a pine tree at the edge of the wet meadow. 679 was in the same situation, different place, much more actively moving around. 680 was one of a group of birds—probably two neighboring pairs. 681 & 682 were in that group, stayed close together, and are probably mates. 683 is undoubtedly one of their young—they seemed to be at least one other. 684 was taken from a tree where I thought I had seen an adult fly. 685, 686, 687, were in a group, all giving alarms, and there must be a pair too, but I’m not sure how it fits. 688 was in a dead sing.
The song here at the meadow is fairly constant; —
— — —— , sometimes the last note omitted.
Thoughts after shinning—got an very odd sex ratio today, 2♀♀:1♂, excluding juvs. Singing very weak and sporadic. Most of the birds, esp. the ♀♀, were slightly fat. Only one bird (681) showed any enlargement of oviduct or ovary. None showed any recently ruptured follicles.
All young seen were very large and flying, but there was no indication of a second brood, from the adults condition. One ♂ had small testes.