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 Date: 2008-04-14 17:42:58Empidonax Sierra Nevada Yosemite National Park Ecology of the Sierra Nevada Yosemite Valley Willow Flycatcher Willow Kern River Preserve Geography of California California Geography of the United States |
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Extirpation of the Willow Flycatcher from Yosemite National Park Rodney B. Siegel, Robert L. Wilkerson, and David F. DeSante, The Institute for Bird Populations, P. O. Box 1346, Point Reyes Station, California 94956; rsi