A monarch butterfly flies to Joe Pye weed, Wednesday, Aug. 28, 2019, in Freeport, Maine. The populations of both insect species have struggled in recent years. Rapid development and climate change are ...

A monarch butterfly with a tag on its wing perches on a flower head at Monarch Watch's butterfly tagging event at the Baker Wetlands on Saturday, Sept. 21, 2024. Despite some rain early in the day, ...

Monarch butterflies from the western United States have arrived in Santa Cruz and other parts of the California coast, clumping on branches of Monterey pine, coastal redwoods and eucalyptus, where ...

Monarch Madness Festival at Hashawha Environmental Center & Bear Branch Nature Center on Saturday celebrated the arrival of fall by spotlighting the annual migration of monarch butterflies as they ...

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

California's monarch butterflies made a miraculous rebound from nearly disappearing in 2020. I visited Pacific Grove, AKA "Butterfly Town, USA," to see the monarch migration for the first time. Photos ...

Monarch butterfly migration is a long journey. Learn how these amazing butterflies make the trip, where monarchs migrate to and why.

This upscale beach town on California’s central coast is full of famous residents—but it's also one of the world’s best places for wildlife watching. Whale-watching excursions take place late spring ...

Migration Magic It’s not easy being a monarch butterfly these days. Your caterpillar’s essential milkweed food is no longer abundant; illegal logging and beetle infestations threaten your main winter ...

Thanks to tiny new ultralight radio tags small enough for a fragile butterfly to carry, scientists are getting a rare, real-time look at how western monarchs move through their winter habitat. It’s ...