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Copyright © 2009, Antonio J. Quezon
Black-throated Green Warbler (Dendroica virens)
Occoquan National Wildlife Refuge, Woodbridge, Virginia, U.S.A., May 13, 2009
Canon EOS 30D, Focal length = 500 mm, Equivalent ISO = 400, Exposure = 1/200 s, f/5.6
