The untrained eye might not have spotted it at all: this sea slug, a nudibranch in the genus Doto, was a few millimeters long ...

Parenting is no joke for our local western snowy plovers. First there’s finding real estate on the San Francisco ...

"These waves are Valkyries fans!" commented @marcyhelm on Instagram (meaning the hot new Bay Area women's basketball team, not the opera). Jacqueline Quale Prince might have been inspired by a beach ...

Naturalist and illustrator John Muir Laws is the author of the Laws Field Guide to the Sierra Nevada and Sierra Birds: A Hiker's Guide. Learn more and find class schedules at johnmuirlaws.com.

Many people, including Doug McConnell himself, would say he led a charmed life. And he did, but it came to a close in January 2026 after nearly four years of effort to recover from a debilitating ...

The parrots of San Francisco have ancestors from two species that hail from two completely separate parts of South America. Amir Aziz / Bay Nature This San Francisco story begins somewhere along the ...

An overhead view of the Sargent Ranch property, also called Juristac by the Amah Mutsun Tribal Band. (Teddy Miller, courtesy of POST) In January, Peninsula Open Space Trust (POST) purchased a ...

At some point during my decades of watching and researching hawks in the Marin Headlands, I began to notice insects. At first it was butterflies: migrating monarchs, local pipe-vine swallowtails, ...

Among life’s small, durable joys is the discovery of a bird’s nest: perhaps in the shape of a bowl, woven from grasses and stems with a skill that seems inexplicable. How could a creature with such a ...