OAKLAND, Calif. - In the San Francisco Bay Area, the Xerces blue butterfly went extinct along the San Francisco coast some 80 years ago, but now the California Academy of Sciences and the Presidio ...

Eighty years after the Xerces Blue butterfly vanished from San Francisco in 1943, researchers analyzed century-old specimens to find its closest living relative, the Silvery Blue (shown above).

Is all hope truly lost to recover populations of the Xerces blue butterfly? It seems the answer has to be yes. The last sighting was in the early 1940s, as it lost its habitat, and its most ...

the Zestos skipper and the Xerces blue are already extinct. Experts are braced for the loss of the Poweshiek skipperling and the Dakota skipper in the very near future. There is also trepidation that ...

It became the namesake of the Xerces Society for Invertebrate Conservation. So working on putting a blue butterfly back where Xerces used to fly is extremely inspiring for conservationists and ...