
After a foggy few weeks at the Farallon Islands, 25 miles west of San Francisco, Saturday turned clear. The five biologists who have been living and working on Southeast Farallon Island since March 30 walked the rickety path up to the island’s lighthouse, at 330 feet the highest spot in a vast expanse of ocean.…

With reasonable precautions, people should spend as much time as possible outdoors, says UCSF Dr. Sohil Sud.

A Q&A with Bay Area birder John Robinson about race, access, and birding.

The mourning cloak butterfly, Nymphalis antiopa, is one of the most widely distributed butterflies in the world, ranging across most of the northern hemisphere. In some places like the British Isles it’s quite rare and to find one would make a lepidopterist’s day, but in California it’s a relatively common spring treat. “It’s a real…

Kayakers and boaters approaching too closely could be leading some sea otters to starve, scientists say.

Is bad news good news for the Bay and Delta’s diminishing flows?