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 ...

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

Monarch butterflies are making their flight north after wintering in Mexico. Here's what to know about one of Earth's fascinating flyers in Michigan.

Monarch butterflies are making their flight north after wintering in Mexico. Here's what to know about the fascinating, ...

in partnership with Mexico’s National Commission of Natural Protected Areas, has released two new studies that underline the ongoing decline in monarch numbers and the deterioration of their winter ...