Monarch butterflies are famous for their annual migrations, but not all migrate. In recent years, more and more monarchs have ...

Urban monarchs formed isolated populations with limited impact on migratory butterflies, suggesting city habitats can support ...

By late May each year, monarch butterflies (Danaus plexippus) return to the Berkshires from their winter home in the oyamel fir forests in the Sierra Madre Mountains of central Mexico, ...

This week on 60 Minutes, correspondent Anderson Cooper reports on the migration of the monarch butterflies, an annual spectacle during which millions of butterflies begin their trek north from ...

"There's a lot of concern about how listing the monarch butterfly could impact use of pesticides," she said. Interest groups on every side of the issue are planning to closely read the proposed ...

Monarch butterflies congregate at the Monarch Butterfly ... And monarchs on the western side of North America—which also migrate but only go as far as southern California—are purportedly ...

The population that lives on the eastern side of North America begins the ... [Related: Help monarch butterflies by safely adding milkweed to your outdoor spaces.] “Because they cross this ...

The monarch butterfly, with its striking orange and black ... “We’ve got 11 acres on one side, and the Department of Transportation allows us access to their easement, which is another ...

Monarch butterflies are famous for their annual migrations, but not all migrate. In recent years, more and more monarchs have ...

But first, they had to get there. This year, more than 60 million monarch butterflies roosted in a four-and-a-half-acre patch of forest on the side of a mountain, 11,000 feet up. Cooper and the 60 ...