FINAL Monarch Butterfly Migration Update: June 25, 2004 FINAL Monarch Migration Update Thank you for helping to track the monarch migration from Mexico! Here is the final map and migration data of the season: The Journey South Will Begin in August! By mid-August, monarchs will begin to gather at northern roost sites, in preparation for their long journey to Mexico. We hope you'll be back this fall to report your sightings of southbound monarchs. In the meantime,
have a great summer! Copyright
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