Today at Oberg Mountain (which is not) in Cook County, I heard and saw
at least one Black-throated Blue Warbler, essentially at and 70-100m
clockwise from the junction of the access trail with the circumference
trail on the top. The singing covered a large area, thus the
speculation about more than one bird. On the way back down I had the
pleasure of again meeting Mary and Dave Brislance, who had detected the
singing. We could not find a good view for Dave to capture one of his
wonderful photographs.
Kim Eckert in his book, A Birder's Guide to Minnesota, describes Oberg
really well as the most accessible place in Minnesota for this species
during nesting.
Mike Steffes
Lake County
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