Cal Academy of Sciences and The Presidio join conservation efforts to bring blue butterflies back to San Francisco coast. Genetic sequencing links Silvery blue butterflies to extinct Xerces blue.

SAN FRANCISCO >> More than 80 years ago, a beautiful butterfly called Xerces Blue that once fluttered among San Francisco’s coastal dunes went extinct as stately homes, museums and parks ate up ...

After Hurricane Andrew ripped through South Florida in 1992, the already-scarce Miami blue butterfly almost went extinct: No one recorded a single sighting for years. Finally, in 1999, a cheer went up ...