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This winter, volunteers from the Xerces Society, a nonprofit environmental group, tallied just 9,119 western monarchs — a ...

The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...

Overwintering populations of monarch butterflies in California have reached a near all-time low since records began, conservationists announced on Thursday. The ...

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 ...

PISMO BEACH, Calif. – On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch Butterfly Count and recorded the second lowest ...