Field notes, v1377
Page 235
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
California Condor April 9 Sespe Creek Condor Refuge, Ventura Co., California - Sunny, warm, breeze from south, hazy clouds. Observations from Dough Flat looking at high cliffs containing many holes. Observations beginning 2:45PM. One bird (adult) flew across face of cliff & out of sight. Vultures & Red-tailed Hawks frequently circle area. An adult condor circles & lands on top of cliff. (2-3 minutes) Shortly a second adult lands beside the first bird. One bird mounted the second within 2 minutes after the two birds were together. The upper adult spread & flapped it wings slowly. Copulation lasted at least a minute. After copulation one adult appeared to lower & then raise its head in front of the other. This was done slowly and several times at 1/2 minute intervals. They were facing each other during this time and this activity was followed by a period when the (several minutes) bills of the two birds were placed together but resolution was such that I could not tell exactly what was happening at this point. Birds remained on the ledge for more than a half hour after this, sitting side by side & occasionally walking a few feet. We left after 4 P.M. with the birds still sitting on the ledge. Fred Sibly (US Fish & Wildlife) indicated that they probably will fly down into a hole in the cliff before dark. Wings are held very constant in flight & nearly outstretched straight -, in contrast to vulture dihedral .