Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Gymnogyps californianus
February 18,1948 Hopper Canyon, Calif.
ed car tracks made since the last storm (who?).
I saw an adult 4 1/2 yr. min. (under wing patches
light tips to greater secondary coverts, tail with
a point) soar N. over head of Wavily Canyon.
Crops of both bulged, that of min. being a button
V-as if skin tighter. Imm., then adult, lit in
top of high heat dead Co. on Flat Ramp of South Ridge.
Imm. begged, four adult, giving gentle "feeding flaps".
Both shifted perch so that at about 1:50, chick
faced adults' left side. There was much begging but
heads mostly obscured by tree trunks. Flaps increased
at times, apparently when feeding contact broken, then
declined to none or nearly no flaps though wings
always extended. I saw adult's head pump eye &
down & twice saw adult head forced high by
chick's bill. So without doubt a feeding of a
1947 chick. By 2:00, both quietly standing on same
limb. Chick scratched side of head with foot. I
was on open hillside 1/4+ mile away at same level.
2:19 adult gone. 2:15, it (same?) was atop dead Bo.
100± yds. from min. 2:29, one from that area flew
slid fast to SE for about 1/2
miles (near Wavily Canyon), joined another, and
both circled together working up canyon. Sky
1% alto stratus; cool fair S. breeze. (At 2:30)