Monarch season starts in earnest in the United States during the month of March, even though the whole migration doesn’t necessarily appear all at once. However, butterflies arriving from Mexico find ...

A newly released survey of the eastern monarch’s 2025-26 winter population in Mexico showed a 64% increase over 2024-25.

Suitable milkweed habitat in Mexico may shift south, fracturing existing migration routes and possibly pushing some butterflies to stay put.

Two new reports estimate a 64% increase in species population and a significant decrease in forest degradation in the butterfly's winter home ...

A key monarch butterfly population is showing signs of improvement this year, but scientists warn the species remains in long ...

Every March, millions of monarch butterflies begin a 3,000-mile migration from central Mexico to Canada, but no single butterfly finishes the journey. It takes three to four generations working in ...

All across the Midwest and Eastern United States, people have been planting native milkweed and plants with nectar like asters and goldenrod to help support the monarch butterfly’s magical migration ...

Across North America, monarch butterfly populations will begin their journey southward to warmer winter climates in Mexico, travelling across much of the United States, including Oklahoma, along their ...

Amid the eucalyptus groves at Natural Bridges State Beach in Santa Cruz, local bug enthusiast Sasha Hernandez squinted through the draping green leaves, searching for flashes of black and orange — the ...

To some people, seeing a monarch butterfly has meaning. These orange and black fliers can be a symbol of strength, change and more.

Learn facts about the monarch butterfly, including how how to tell male and female monarchs apart and if monarchs are poisonous.