The Fender’s blue butterfly has fluttered away from the brink of extinction. The species, once so rare it was thought to be extinct, is no longer considered endangered, according to a January 11 ...

Within the southern two-thirds of these dunes lies a preserve, home to the largest population of the endangered El Segundo blue butterfly. Yet these insects, along with another endangered local ...

Not far from the Concord Municipal Airport, between a post office and a dance gym, sits a 28-acre field that’s been restored as a refuge for an endangered species of butterfly. Karner blue ...