The Xerces blue butterfly went extinct along the San Francisco coast some 80 years ago. But scientists have identified a ...

The Western population of the monarch butterfly has declined ... 10,000 found living in California this winter, a foreboding sign for the future of the beloved black-and-orange insect.

The California Academy of Sciences used genetic testing to identify a blue butterfly species similar to the Xerces species that went extinct and disappeared from the San Francisco coastline.

The California Academy of Sciences used genetic testing to identify a blue butterfly species similar to the Xerces species that went extinct and disappeared from the San Francisco coastline. Through ...