Journey North, which gathers reports from volunteers across the country, has been tracking the butterfly’s movement since the ...

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

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

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.