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

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.

After stalling in Oklahoma in early April as they waited for milkweed to emerge, the butterflies have now crossed into Kansas ...

Second, cities must bridge the chasms they have opened along the monarch’s migratory routes. Each fall and spring ... of ...

Climate change and industrial agriculture have decimated the western monarch butterfly’s crucial food source, threatening the ...

Monarch butterflies left Mexico weeks ago on their annual northward migration. Now, the colorful insects are nearing Michigan as temperatures continue to warm. "Monarchs have made their way north ...

Acts of creation are ordinarily reserved for gods and poets,” said Aldo Leopold in A Sand County Almanac. “But humbler folk ...

Second, cities must bridge the chasms they have opened along the monarch’s migratory routes ... No single butterfly makes the entire trip. Each leg of the migration is completed by a different ...