Why Do Monarchs Migrate?

The Monarchs' Migration
Like many birds, monarch butterflies migrate south for the winter. They're not able to survive winters in the US. Plus, the plant the caterpillar feeds on – milkweed – is not available to them in the winter.

Why does monarch butterfly migrate?

One explanation might be that when monarchs march north, they are essentially following the bloom of their primary food source—milkweed plants. And then when winter comes and those plants die back, the animals retreat to a place with conditions that protect them from the weather.

What is the cause of the monarch migration?

Climate change, pesticides put monarch butterflies at risk of extinction. A new study finds that monarch wings are getting larger, possibly because climate change has forced the butterflies to travel longer distances as breeding grounds shift farther north.

Robert Thorne

Robert Thorne

Automotive & Future Transportation Editor

Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.