Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Ford
2840
Gymnogyps californianus
19 January 1976 San Francisco Cliff.
claws. Photos show youngster with full crop & holding head up. Chick did not regurgitate on first trip. On later trips it did. The photos show a great deal of handling of the chick.
On one trip adult was in the cave when they entered. She was captured & banded with an eagle band. The old bird was kept for 2 or 3 hours, photosed, wingspread measured, etc. Movies show all this & details of head color. Head & neck could not be held with one hand - very strong. It was all two men could do to hold the bird.
at one point the chick was brought near the adult for a picture & the adult snapped at it (luckily missed). When released, attempt was made to get a photo of bird adult fly-ing off from the cave. One of the men gave adult a toss to launch it but adult swung around & ran back into cave to the chick.
Some photos of adult + chick together were taken (adult standing with head down near chick). Soon after adult ran to a rock point 100+ ft. away, spread wings as if running for a while, then took off. No other pictures of the nest adults perched were taken. Work said that 2 adults were