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Prairie Warbler (Dendroica discolor)
Copyright © 2009, Antonio J. Quezon

Prairie Warbler (Dendroica discolor)

Occoquan National Wildlife Refuge, Woodbridge, Virginia, U.S.A.
Canon EOS 30D, Focal length = 700 mm, Equivalent ISO = 400, Exposure = 1/640 s, f/5.6