Butterflies are some of the most beautiful insects in the world ... Now, imagine seeing a massive monarch butterfly swarm, creating a breathtaking spectacle! This video by Nature on PBS shows ...

A swarm of butterflies, winging its way south for the winter, was "spotted" as large blue blobs on weather radar last week over southern Illinois and central Missouri. "We think these targets are ...

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. - [Narrator ...

In contrast, butterfly and moth swarms don't seem to have as great an influence, because their mobs generally have low densities. However, some painted lady butterfly swarms have grown as large as ...

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 ...