Pacific Grove is known as ‘Butterfly Town USA’ for its role as an overwintering spot. As the insect’s population plummets, residents are coming to its rescue ...

Monarch butterflies return to California for the winter in November in Santa Cruz, California. The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as a threatened species ...

U.S. wildlife officials announced a decision Tuesday to extend federal protections to monarch butterflies after years of warnings from environmentalists that populations are shrinking and the beloved ...

A monarch butterfly at the Coastal Access Monarch Butterfly Preserve in Los Osos, Calif., on Jan. 20. (Gary Coronado / Los Angeles Times) The Western population of the monarch butterfly has declined ...

MADISON, Wis. (AP) — U.S. wildlife officials announced a decision Tuesday to extend federal protections to monarch butterflies after years of warnings from environmentalists that populations are ...

For many, their latest expedition in Baja Sur marks a return, more than a decade after their investigation began.

While a devastatingly low number of monarch butterflies migrate to San Luis Obispo County this winter, the federal government has proposed listing the insect as threatened under the Endangered Species ...

SACRAMENTO, Calif.— The California Fish and Game Commission voted unanimously today to declare the Quino checkerspot butterfly a candidate species under the California Endangered Species Act, granting ...

OAKLAND, Calif.— The Center for Biological Diversity and Endangered Habitats League petitioned the California Fish and Game Commission today to list the Quino checkerspot butterfly as endangered under ...

Western monarch butterflies at Natural Bridges State Beach, California, one of the top four overwintering sites for the species. (Photo courtesy of California State Parks Foundation) The Western ...

California’s iconic monarch butterfly population saw a sharp decline this year, which biologists attribute to the hot summer and fall temperatures across the state affecting the species’ migratory ...

State officials granted temporary protections to the Quino checkerspot, setting up a review — and a new flashpoint in the housing-versus-conservation fight. SACRAMENTO, California — California ...