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

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 monarch butterflies are starting to come through San Antonio and the rest of Central Texas on their migration from Mexico to Canada. If you have milkweed growing in your landscape or area ...

And, a privilege of living in Pacific Grove specifically, we got to witness the migration of western monarch butterflies. Those monarch butterflies are just a fraction of the weight of a feather.

Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of millions of the butterflies are on an epic aerial journey back north.

The plight of the monarch butterfly could cost farmers a valuable tool in the fight to protect crops from weeds and pests. An effort is underway to list the monarch butterfly as threatened under ...

Foglia also soon realized that the butterflies’ migration was taking place alongside human migration. He encountered people who, like the butterflies, were also making the journey north from ...

Every year, for millions of years, a huge number of painted lady butterflies have migrated thousands of miles across Europe, the Middle East and Africa. Though they've been a common sight ...