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Mountain Bluebird (Sialia currucoides)
Copyright © 2009, Antonio J. Quezon

Mountain Bluebird (Sialia currucoides)

Chittenden Road, Yellowstone National Park, Wyoming, U.S.A., September 26, 2009
Canon EOS-1D Mark II N, Focal length = 500 mm, Equivalent ISO = 400, Exposure = 1/1600 s, f/5.6