Photos: Saving the golden-winged warbler

Male Golden-winged Warbler
Dr. Henry Streby, left, holds a male golden-winged Warbler on June 9, 2011, on the Tamarac National Wildlife Refuge near White Earth, Minn. Streby and other researchers -- including Dr. John Loegering at right -- are studying the songbird's habitat and breeding preferences in northern Minnesota.
MPR Photo/Ann Arbor Miller

Nearly half the golden-winged warblers in the world are in northern Minnesota right now for the summer breeding season, and the tiny birds have become the subjects of a two-year research project that could help determine whether they should be listed as a threatened or endangered species.

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