The 2025 State of Our Estuary assessment, released this fall at a regional conference, takes the pulse of the San Francisco Estuary in 17 indicators. It’s a health checkup for over 38 million acres of ...

The first attempts to restore Mendocino’s streams for coho and other salmon began in the 1960s. Decades of logging in the ...

Editor’s note On a Saturday evening in late October, my boyfriend and I were walking around César Chávez Park in Berkeley ...

One year after the discovery that golden mussels had invaded the Delta, thick colonies coat boats and piers and threaten ...

Tiny silver fish float up at Clear Lake in August. Big Valley Band of Pomo Indians records indicate this was the biggest fish kill since 2017. (Courtesy of Luis Santana) As Luis Santana motored out ...

Later this year, the Amah Mutsun Tribal Band—Indigenous people whose ancestors lived throughout the river valleys that stretch inland from Monterey Bay—will reclaim land within the tribe’s historical ...

A money spider (Tenuiphantes sp.) balloons, under controlled conditions, from its daisy perch. You can see the trichobothria (leg hairs) and dragline silk in this picture. (Michael Hutchinson via ...

A less-frequently spotted Vespula in our area: the forest yellowjacket (Vespula acadica). (Tony Iwane via iNaturalist, CC-BY-NC) Ask almost anyone about yellowjackets; they will have a harrowing tale ...

Audrey Fusco can’t help getting excited at the sight of one monarch butterfly these days. In the spring sun in Bolinas, one poses briefly on the spire of a tall purple flower, wings aglow in the ...

Bay Nature connects the people of the San Francisco Bay Area to our natural world and motivates people to solve problems with nature in mind.

Before it was a city, much of San Francisco was a dunescape. Nearly a third of it was covered in sand. Western winds swept the sand into heaps and piles—one 80-foot dune rested in the future Union ...