Every year, millions of Methuselah or super generation monarchs overwinter in the oyamel fir forests of Central Mexico after a 3,000-mile journey from Canada. Then in spring, they start the whole ...

Each year, monarch butterflies migrate between Canada and Mexico, a generational flight with deep environmental resonance.

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 change ...

Monarch butterflies were in abundance just a few decades ago, but now they’re a rare sight indeed and that’s likely because they’re now endangered. MEXICO CITY — The number of monarch butterflies ...

Suitable habitat for migrating monarch butterflies will shift southwards because of climate change, according to a study ...

New research shows climate change may push monarch butterflies farther south and make their long migration harder in the ...

MEXICO CITY — The number of monarch butterflies wintering in the mountains of central Mexico dropped 22% from the previous year, and the number of trees lost from their favored wintering grounds ...

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 change ...

MEXICO CITY (AP) — The first monarch butterflies have appeared in the mountaintop forests of central Mexico where they spend the winter, Mexico’s Environment Department said Saturday. The first ...

FILE - In this Dec. 9, 2011, file photo a Monarch butterfly sits on a tree trunk at the Sierra Chincua Sanctuary in the mountains of Mexico's Michoacan state. The amount of Monarch butterflies ...