Why Do Monarch Butterflies Swarm? Monarch butterflies, like other butterfly species and birds, must migrate to warmer climates during the cold winter months. Monarch butterflies are unique because ...

In the mountains of Mexico, a spy hummingbird ventures into the heart of a breathtaking monarch butterfly swarm. Few filmmakers have been able to capture the spectacle this closely.

No wonder these swarms are, evocatively, also called kaleidoscopes. Every year, monarch butterflies undertake the arduous 3,000-mile journey from the Great Lakes to winter in California and Mexico.

Scientists say roosting monarchs took up 2.2 acres of Mexican fir forests this winter. That's the second smallest overwintering population on the books.

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 ...

Walton blames the use of herbicides and pesticides for the decline in the monarch butterflies. If cattle eat milkweed, it can ...

ASGA's vice president of science and innovation told sugarbeet growers the potential listing of monarch butterflies as threatened could be difficult for those who planted milkweed for them.

Swarms of butterflies are inundating portions of South Texas — and they aren’t the monarch migrations most Texans know and love. Skip to content KXAN Austin ...

Why Do Monarch Butterflies Swarm? Monarch butterflies, like other butterfly species and birds, must migrate to warmer climates during the cold winter months. Monarch butterflies are unique because ...

Now, imagine seeing a massive monarch butterfly swarm, creating a breathtaking spectacle! This video by Nature on PBS shows a stunning flutter of butterflies. Keep reading below to learn about why.