For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of millions of the butterflies are on an epic aerial journey back north.

The monarch butterflies are starting to come through San Antonio and the rest of Central Texas on their migration from Mexico to Canada. If you have milkweed growing in your landscape or area ...

Sightings of monarch butterflies have been seen predominantly near southern cities like Savannah and St. Mary's, according to Journey North's interactive migration map. Here's what we know: When will ...

The peak of the spring monarch butterfly migration in Texas typically occurs from late March to early April. See where on Journey North.

Central New York is set to welcome a remarkable natural event this spring as millions of monarch butterflies begin their ...

The Xerces Society for Invertebrate Conservation says, along the California coast, 4.5 million monarchs overwintered in the ...

Sightings of monarch butterflies have been seen predominantly near southern cities like Savannah and St. Mary's, according to Journey North's interactive migration map. Here's what we know ...