California condor survey field notes, v1477
Page 63
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
California Condor Eben Mcmillan 15 January 1964 condor At 8:39 A.m. an adult condor came from the south, into the stiff wind, with no apparent effort, and crossed along east face of Hopper Mountain to the ridge north of camp that forms north boundary of Sulphur Creek drainage and played along the top of this ridge on the upcurrents of air until moving on northward at 8:41 A.m. condor At 8:42 A.m. a young condor in the dull color phase, with the white under the wings very dull and spotted, came from the south and circled above camp several times before weaving its way northward where it remained for some time playing on the up-currents of wind that rushed up from the Holoin-the-wall area of Hopper canyon before moving on northward and out of sight at 8:48 A.m. This condor flew very well. While hovering on the strong updrafts of wind, or, as I use the term sitting on the wind, condor use the wrists a good deal but never with the tail outstretched and sort of fluttering as do the Red-tailed hawks or sparrow hawks who also hunt this area and can be seen much of the time, hovering on the wind. But the condor glide the impression of being held up by a string, or like and just remain in one spot with wings outstretched to full length and apparently motionless and effortless. I have often wondered what a condor would do in a stormy, heavy, wind while watching it maneuver about in nice weather, it never having been my lot to watch these birds in difficult weather conditions before; but after seeing condor yesterday and today, in very high, adverse winds I am amazed at their ability to negotiate about with apparent ease, and seeming to welcome the strongest and most turbulent wind currents for at no time today, or yesterday, did any condor I observed seem to be searching for relief from the