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  • Spring Monarch Migration
    As of April 15, 1997

    Before March 1 Red
    March 1-March 15 Gold
    March 16-March 31 Brown
    April 1-April 15 Magenta

    Here's the latest snapshot of this spring's monarch migration, thanks to Macalester College student Colin Maher. This map shows the extent of the migration as of April 15, 1997. (Click on the map and it will enlarge to a full-screen image.)