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Cold Snaps Trigger Monarch Butterfly Migrations

Migrant monarch butterflies tanking up on nectar as they move south.

Millions of monarchs inhabit butterfly country

February 25, 2013

Every year, millions of monarchs migrate from the eastern United States and Canada to central Mexico, a journey of over 2,000 miles. The tiger-striped butterflies arrive in late October and early November to hibernate in fir trees until February.