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Migrating butterflies will set your heart aflutter

Monarch butterflies usually arrive in central Mexico around the first week of November, after their yearly 2,500 mile migration from Canada. They begin their return around March. Read more about the migration here.
Monarch butterflies sit on a tree trunk.
Monarch butterflies sit on a tree trunk.Marco Ugarte / AP
A monarch butterfly sits on a tree trunk at the Sierra Chincua Sanctuary in Mexico on Dec. 9.Marco Ugarte / AP
Monarch butterflies sit on a tree trunk.Marco Ugarte / AP
Hundreds of monarch butterflies crowd over a tree trunk.Marco Ugarte / AP
Hanging from a tree branch.Marco Ugarte / AP

Monarch butterflies usually arrive in central Mexico around the first week of November, after their yearly 2,500 mile migration from Canada. They begin their return around March. 

Read more about the migration here.