- Author: Kathy Keatley Garvey
There's nothing like seeing an admiral at a marina.
That would be the Red Admiral butterfly, Vanessa atalanta, at the Berkeley marina.
It's often very common in the urban Bay Area, says butterfly expert Art Shapiro, professor of evolution and ecology at the University of California, Davis. The Red Admirals often share sites with West Coast Ladies.
"Both breed on the weed Parietaria judaica (Pellitory) there."
We also saw a West Coast Lady, Vanessa annabella, fluttering around the Red Admiral last Saturday.
But it's the other butterflies that Shapiro is concerned about. "At this time of the year, one used to see Great Coppers (Lycaena xanthoides) up the yin-yang on the 'waste ground' across the marina parking lot, between it and the freeway. Since they made it part of Eastshore Park, it seems to be gone. Typical!"
Other "marina fauna" from back when, he says, included Anise Swallowtails and Large Marbles. "The latter seems to be gone too; it's extinct regionally but there is one population I know of near Concord."
A renowned lepidopterist, Shapiro monitors the butterfly population in Central California and posts information on his website, Art's Butterfly World.
He's the author of the book, Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions, illustrated by Tim Manolis. "The California Tortoiseshell, West Coast Lady, Red Admiral, and Golden Oak Hairstreak are just a few of the many butterfly species found in the floristically rich San Francisco Bay and Sacramento Valley regions," Shapiro writes. He covers and identifies more than 130 species in the book.