MEXICO CITY (AP) — The number of monarch butterflies wintering in the mountains west of Mexico City rebounded this year, ...

Monarch butterflies are migrating north and have been spotted in states near Michigan. Although their wintering population doubled this year, monarchs have experienced a significant overall decline ...

The annual migration south for monarch butterflies peaks in late September. Here's how to watch for the regal butterfly.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MEXICO CITY (AP) — The number of monarch ...