The annual migration of monarch butterflies is one of science's great mysteries: millions of monarchs know the correct path ...

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.

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.

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

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 ...

Monarch butterflies are migrating through San Antonio, laying eggs on milkweed, while other species like the Gulf fritillary ...

Painted ladies are the ultramarathoners of the butterfly world—even more so than monarchs. Scientists have long known about ...

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

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

The butterflies’ resilience shows that some species are capable of adapting to dramatic changes in climate, food availability ...

The latest official report of monarch butterflies overwintering in Mexico has just been released and offers some ...

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 ...