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

Monarch butterflies are making their annual journey north out of Mexico to their summer breeding grounds. See where they've been spotted in Oklahoma.

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, ...

TWIN FALLS, Idaho — That man staring at a patch of blooming goldenrod beside the road is wildlife biologist Ross Winton. His butterfly net and his sheet of tiny stickers are tools in a massive effort ...

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 ...