butterfly migration

A cropped closeup view of the monarch butterflies.

Monarch Butterfly Overwintering in California

Caitlin Dempsey

November and December are the best times to see large clusters of monarch butterflies overwintering in the coastal groves of California.

Painted lady (Vanessa cardui). Image: NPS, public domain.

These Butterflies Have the Longest Known Migration Route

Caitlin Dempsey

Each fall, Painted Lady butterflies (Vanessa cardui) migrate from Europe to subtropical Africa. Individuals can travel as far as 4,000 kilometers.