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 ...

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

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

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

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 ...

Many butterflies from around the world migrate each year, but no butterfly can match the incredible monarch butterfly migration. In autumn, these orange and black butterflies travel up to 2,000 miles ...

Monarch Watch is contributing to a comprehensive study of the Monarch butterfly migration by tracking butterflies with tiny ...

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 ...

A daring surgical procedure has given a doomed monarch butterfly a new lease of life. The delicate operation was captured on ...