Is It the End for the Monarch's Cross-Continent Migration? (Op-Ed)
Migrant monarch butterflies in mid-air as they travel south.
Millions of monarchs inhabit butterfly country
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.