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The iconic monarch butterfly is declining across North America. You can help make a difference by providing the species with its food plant: milkweed. A monarch butterfly gliding over a field on ...

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing habitat and climate ...

“This project represents hope for the Monarch butterfly and the ecosystems it helps sustain,” said Nathalie Brochu, Interim CEO of Butterfly Pavilion. “Restoring these vital habitats isn’t ...

The caterpillar’s body liquefies, and from this gooey substance, a new form emerges. After about two weeks, the chrysalis splits open, unveiling the adult butterfly. As the adult butterfly emerges, ...

The number of monarch butterflies migrating to California over the winter has hit a near-record low, according to the agency that conducts the annual count. The 28th annual Western Monarch Count ...

Before National Geographic published its famous August 1976 cover story detailing the search for the monarch butterfly’s wintering grounds, nobody knew where these strikingly beautiful creatures ...

Fewer-than-usual monarch butterflies migrated through San Luis Obispo County this winter, according to data from the conservation-focused nonprofit the Xerces Society. “It feels like a punch to ...

Michoacán is home to the world-famous Monarch Butterfly Biosphere Reserve, which spans over 562 square kilometers (also including parts of México state). Recognized as a UNESCO World Heritage ...

For the past three years, more than 200,000 western monarch butterflies spent their winters along the California coast — huddling together in tall tree groves, finding respite from the wind from ...

Because monarch butterflies are widely distributed and recognized, their conservation status often is oversimplified. We are among the many entomologists who study the ecology of insects, including ...