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Science 14 August 1987:
Vol. 237. no. 4816, pp. 768 - 770
DOI: 10.1126/science.237.4816.768
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Articles

Age and Diet of Fossil California Condors in Grand Canyon, Arizona

STEVEN D. EMSLIE 1

1 University of Florida, Department of Zoology, Gainesville, FL 32611.

A dozen new radiocarbon dates, together with a thorough review of its fossil distribution, shed new light on the time and probable cause of extinction of the California condor, Gymnogyps californianus, in Grand Canyon, Arizona. The radiocarbon data indicate that this species became extinct in Grand Canyon, and other parts of the inland West, more than 10,000 years ago in coincidence with the extinction of megafauna (proboscidians, edentates, perissodactyls). That condors relied on the megafauna for food is suggested by the recovery of food bones from a late Pleistocene nest cave in Grand Canyon. These fossil data have relevance to proposed release and recovery programs of the present endangered population of California condors.

Submitted on March 5, 1987
Accepted on June 3, 1987


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Dietary controls on extinction versus survival among avian megafauna in the late Pleistocene.
K. Fox-Dobbs, T. A. Stidham, G. J. Bowen, S. D. Emslie, and P. L. Koch (2006)
Geology 34, 685-688
   Abstract »    Full Text »    PDF »
Pleistocene to recent dietary shifts in California condors.
C. P. Chamberlain, J. R. Waldbauer, K. Fox-Dobbs, S. D. Newsome, P. L. Koch, D. R. Smith, M. E. Church, S. D. Chamberlain, K. J. Sorenson, and R. Risebrough (2005)
PNAS 102, 16707-16711
   Abstract »    Full Text »    PDF »


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