s were recorded on October 4, 2026 near Lincoln, Massachusetts, in the midst of their autumn migration southward.1 The eastern population currently bears a federal Proposed Threatened listing status under the Endangered Species Act, with final determination delayed to 2030 at earliest.1, 2 This generation is routing toward overwintering sites in the mountains of central Mexico, a journey exceeding 2,000 miles that will carry them through the region into late October.3
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