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.

A new study compiling butterfly surveys across the country found ... Katahdin Arctic and the boreal forests favored by Northern Blue, a species of special concern. Herb Wilson, a retired Colby ...

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 milkweed plant is essential to the monarch: It is the only plant on which they lay their eggs and the only source of food for baby monarch caterpillars. As spring arrives, the butterflies ...

"Baby Blue Bathing Suit," out Friday, is part of the soundtrack for the new Beach Boys documentary Rachel DeSantis is a senior writer on the music team at PEOPLE. She has been working at PEOPLE ...