Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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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