Monarch butterflies are at the beginning of an incredibly long migration south to overwinter. Here's where Michigan's ...

One way trip to Mexico for monarchs as cooler months approach Canada and the United States.

Oklahoma's peak monarch migration typically occurs from late September through mid-October, but weather and food supplies can ...

Monarch butterflies complete an annual migration that is thousands of miles long. How do they do it, and when does it take ...

As the days are getting chillier, monarch butterflies in Wisconsin are getting ready to take flight to central Mexico. This ...

The project relies on tiny tracking devices weighing about 60 milligram, that are attached to monarch butterflies.

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. The painted lady butterfly—or Vanessa cardui—is a traveler ...

A decade ago, a federal task force announced a plan to help monarch butterflies along their great migration. The six-state ...

With vigorous debate surrounding the health of the monarch butterfly, new research from the University of Georgia may have answered the biggest question plaguing butterfly researchers. Why are the ...

Tiny GPS trackers put on monarch butterflies on Sunday will help researchers follow their migration from Wisconsin to Mexico.

With vigorous debate surrounding the health of the monarch butterfly, new research may have answered the biggest question plaguing butterfly researchers. Why are the wintering populations declining ...

Every year, for millions of years, a huge number of painted lady butterflies have migrated thousands of miles across Europe, the Middle East and Africa. Though they've been a common sight throughout ...