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 ...

The magnetic compass is the last unknown sense in migrating animals. For some scientists, the monarch butterfly is leading ...

For years, home gardeners have been told to do one thing to save monarch butterflies: plant milkweed, the only plant monarch caterpillars eat. And for years, that’s what Linda Barber Auld, known as ...

Biologists have attached tiny, solar transmitters to the monarch butterflies, allowing researchers and everyday visitors to ...

SAN DIEGO — U.S. Fish and Wildlife Service has proposed listing monarch butterflies as a threatened species and has considered some possibly contradictory ways to protect them, Nicholas Storer, vice ...

About a week ago, several monarch caterpillars were busily munching on the native narrowleaf milkweed I’d planted in my backyard in the San Francisco Bay Area to provide habitat for the imperiled ...

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While the USFWS does not specifically mention Texas—which monarch butterflies funnel through twice a year—the state's agricultural commissioner Sid Miller is making it known he firmly stands against ...

Whether you’re a butterfly fanatic or simply interested in nature, the monarch butterfly is worth a study. Beautiful and serene, monarch butterflies have a unique lifespan. But how long do monarch ...

Professor Elizabeth Crone, Department of Evolution and Ecology, checks a non-native milkweed in the San Francisco Bay Area for monarch butterfly eggs and caterpillars. Known for long-distance ...