A group of scientists and volunteers released seven silvery blue butterflies in San Francisco’s Presidio on Tuesday in an effort to add a hint of new life to a biodiversity-constrained world. The ...

The California Academy of Sciences is leading an effort to bring back the Xerces blue butterfly, which went extinct around 1941 because of human development in San Francisco. Researchers are hoping to ...

There’s good news tonight for a team in Presidio National Park, working to introduce Silvery Blue butterflies to the ecosystem to act as crucial pollinators. The butterflies are close genetic ...

A butterfly that went extinct decades ago after the destruction of its Bay Area habitat is now the driving force behind its restoration with the help of a close relative now fluttering in its terrain.