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.

The Monarch Butterfly Biosphere Reserve World Heritage property protects key overwintering ... within 14 overwintering colonies in the oyamel fir forests of central Mexico. The property protects 8 of ...

Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of ...

The latest official report of monarch butterflies overwintering in Mexico has just been released and offers some ...

Monarch butterflies left Mexico weeks ago on their annual northward migration. Now, the colorful insects are nearing Michigan as temperatures continue to warm. "Monarchs have made their way north ...

WWF works to sustain the natural world for the benefit of people and wildlife, collaborating with partners from local to global levels in nearly 100 countries.

The number of monarch butterflies wintering in the mountains west of Mexico City, rebounded this year, doubling the area they covered in 2024 despite the stresses of climate change. MEXICO CITY ...

These wintering grounds in Michoacan, Mexico, are not just a refuge ... They created the Monarch Butterfly Biosphere Reserve. When I think about visiting the wintering grounds of the monarch ...

By any measure, the revival of the bald eagle stands as one of the great environmental triumphs in conservation history. In ...

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.