Monarch butterfly spotted in Decorah during fall migration
A was observed on 2026-10-11 in Decorah, Iowa, consistent with the fall migration through the Upper Midwest.1 In Minnesota, monarchs peak in migration around August 23 and thin substantially by October 18.2 The October observation falls in the active migration window for this region, with butterflies still on their southbound journey toward central Mexico overwintering sites.2
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