The monarchs have arrived!
Thousands upon thousands of butterflies--too many to count--appeared suddenly at their traditional staging area just outside of the sanctuaries on November 1. (More...)

The Finish Line
Mexico's Monarch Butterfly Sanctuaries

Monarchs from across eastern North America funnel to Mexico's Transvolcanic Belt. There they cluster on only 12 mountaintops. Somehow they find these small dots on our planet.
(The location of the overwintering sites are indicated by red triangles on the maps below.)

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