Monarch butterflies gather at their wintering colony in the Monarch Butterfly Biosphere Reserve in Michoacán, Mexico. “So for over a decade now, the colonies haven’t really changed in size.

Wildlife biologists there are helping make their land a more comfortable home for monarch butterflies. Each year, the butterflies migrate 2,000 miles across North America, many stopping in Colorado.

During their passage through Mexico, monarch butterflies depend on the shelter of endangered trees—so this scientist is leading a huge experiment to build them a new winter habitat.

Monarch butterflies are in danger of extinction. Your yard can save them. | Opinion By any measure, the revival of the bald eagle stands as one of the great environmental triumphs in conservation ...

Monarch butterflies are making their flight north after wintering in Mexico. ... Plant a milkweed and grow a monarch habitat. Make a donation to the Michigan's Nongame Fish and Wildlife Trust Fund.

Gregory Bull/AP, File FILE – This Aug. 19, 2015, file photo, shows a monarch butterfly in Vista, Calif. The number of western monarch butterflies wintering along the California coast has ...

With its tall, rounded form, decorated with glossy green leaves and globe-like flowers, Buttonbush looks great, too. "I love ...

Mary Ann’s dedication and the scientific efforts at Disney illustrate how community action and innovation can unite to protect monarchs.

More than a dozen volunteers planted 850 milkweeds throughout the Spring Ridge Wildlife Sanctuary on Monday as part of a budding monarch butterfly habitat conservation project. Through a grant from ...

Help declining Monarch butterfly populations by joining South Pasadena’s first Milkweed Restoration and Giveaway. By Friends ...

Monarch butterflies are quite a sight to see, arriving mid-October and staying in the area through the end of February.