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

Researchers collected several butterflies from Alberta, analyzed their DNA and compared the results to other butterfly species, the study said. Looking at the results, researchers realized they’d ...

It's common knowledge that the monarch butterfly is in trouble. However, like the causes themselves, the story of why the charismatic insect isn't faring well has evolved.

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 ...