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

These late-blooming plants native to North America help feed butterflies — especially monarchs-— at a crucial point.

Monarchs rely on milkweed as the sole host plant for their caterpillars, and without it, their populations struggle to thrive ...

Each year, millions of monarch butterflies travel thousands of miles across North America to escape the cold and find ...

Scientists have long known that milkweed cardenolides, which in most animals disable a vital sodium-potassium pump enzyme if they are absorbed into the blood, serve to make caterpillars and ...

A study recently published in the journal Science determined that the butterfly population across the continental U.S. has been dropping at an average rate of 1.3% since the year 2000. The study's ...

It's hard to believe that milkweed has nearly disappeared from Vermont's landscape in just a few short years. In the Green Mountain State, corn crops are everywhere and along the edges of those fields ...

Only three molecular changes are needed for fruit flies to digest milkweed toxins Gene-edited fruit flies have gained some of monarch butterflies’ superpowers — specifically, the ability to ...

As I began my career as an intern at the Audubon, you can imagine the complete sense of euphoria that I felt upon learning that part of the job included hunting and raising monarch caterpillars ...