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.

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

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.

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 ...

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.

She was optimistic about the Monarch Bay Golf Club in San Leandro, which had 246 butterflies, as well as the former Skywest Golf Course in Hayward, where 477 butterflies were spotted, though she ...

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.