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.

FILE - A Monarch butterfly rests near a stream at Piedra Herrada sanctuary in the mountains near Valle de Bravo, Mexico, Jan. 4, 2023. (AP Photo/Marco Ugarte, File) Visit our YouTube page (opens ...

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.

The annual migration of monarch butterflies is one of science's great mysteries: millions of monarchs know the correct path ...

and southeast Canada to the mountain forests in central Mexico. With its notable orange and black markings, the monarch butterfly is one of the most recognizable insects in the world. In North ...

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

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

MEXICO CITY (AP) — 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 ...