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 are usually seen in Michigan from late spring to early fall.

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

Monarch migration is one of the longest insect migrations in the world, with some butterflies traveling up to 3,000 miles.

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: Like many ...

The annual Monarch butterfly migration trough Oklahoma City has begun with areas in the Myriad Gardens and Scissortail Park providing plenty of nectar for their journey, Wednesday, Sept.

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 ...