Chart Your Own Route
This edition of the Why Files examines the mammoth monarch migration -- the spectacular flight of millions of individuals to the wintering grounds of their ancestors.

You can start here. But if you think the grass is greener on the other side of the fence, then check out some other news about migration:

What about bird migration? Is there a relationship between forest fragmentation and songbird survival? Want to attract butterflies or birds to your backyard? Sea animals migrate, but only recently did scientists realize just how far the Northern elephant seal can travel (prepare to be astonished).

Teachers: Monarch butterflies have hatched these collaborations between researchers and students:

Monarch Watch focuses on the butterfly itself.
Journey North is a collaborative study of the migration of monarchs and many other animals.

Want to read the factcheckers and credits for this issue?