California condor survey field notes, v1476
Page 388
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
p.299 -Continued- California Condor Eben McMillan 9 September 1963 should be assumed that the ring-necked bird must have had all the color characteristics of an a bird, especially the white under the wings, for the notes took on each bird as they came out of the canyon h no mention of any difference in the plumage colo of any of the birds excepting the young black-h bird that was seen from the time it commence climb up into the top of the tree for a jumping b place. From this I would say that except o close distances any young condor, excepting black headed birds, can be easily mistaken for adult bird. Adult condor can be easily told, or distinguished, from ring-necked or younger condor when the head can be plainly seen; but a ring-necked bird when perched, on a cool morning, with the black ruff of the neck drawn u to the base of the skull is very difficult to distinguish from a black-headed bird even tho one has the opportunity to see the white under: wings. When young condor are sunning themselves with wings out-stretched aging can be most difficult also. at 10:30 A.m. the sky was clear of large birds except, a lone buzzard that drifted by from the north, a cool w wind was blowing. At 10:40 Several buzzards came from the North and alighted in both oak and pine trees that grow along the top of the ridge south of the canyon where the carcasses lay. Four or Five buzzards circled the bottom of the canyon above the carcasses, At 12:45 P.m. Three condor came in from the south alighted in bent pine, on ridge, south of carcasses. They perched in this pine for five minutes then flew out