Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of ...

By any measure, the revival of the bald eagle stands as one of the great environmental triumphs in conservation history. In ...

For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

The annual migration of monarch butterflies is one of science's great mysteries: millions of monarchs know the correct path ...

The monarch butterfly's annual migratory journey from Mexico to the U.S. and then Canada is a breeze compared to the federal government's lengthy process to protect the dwindling species.