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When yellow star thistle hitched a ride to California on alfalfa seed in the mid-1800s, it found fertile soil, a temperate climate, and no natural enemies. In its native Mediterranean home, yellow star thistle is kept in check by a … Read more
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Things begin rumbling about now. Storm clouds pile up along the outer Coast Ranges, the winds shift and come out of the south, days get shorter, and the air gets colder. We all know what’s coming: the rainy season. Termites and spiders know it too, and they’re getting busy.
Listen for the winter song of the golden-crowned sparrow, which arrives following a spectacular migration every fall.
Q: What is the largest species of fish you could find in San Francisco Bay? A: Let’s limit ourselves to the true bony fish, which leaves out any great white sharks that might wander into the Bay looking for harbor … Read more
You can easily visit the 10-million-year-old Sibley Volcano (see Voice of the Volcano, April-June 2005) in the hills above Oakland. And college geology classes often visit the Nicasio Dam in West Marin to see pillow basalt lava that erupted deep … Read more
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When I was three years old, I lost sight in my left eye in a freak accident while playing with a friend in the park. The permanent vision loss in that eye didn’t cause any lasting problems (outside of my … Read more
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Walk a few miles in Jack London’s boots to see the landscape he declared more beautiful than any he’d seen in all his travels.
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By the time that sudden oak death (SOD) began hitting North Bay oaks and tanoaks in the mid-1990s, Ted Swiecki and Elizabeth Bernhardt, husband-and-wife plant pathologists, had been studying oak diseases in California oak woodlands for many years in the … Read more
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In 2001, bulldozers excavated two immense old army water tanks that long sat at the edge of Mountain Lake, a two-and-a-half-acre lake in San Francisco’s Presidio that’s one of only three natural lakes in the city. That same year, native … Read more
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Since 2000, sudden oak death has spread through 14 California counties, including all nine in the Bay Area, threatening our signature oak woodlands. Though rain, wind, and fog have caused much of that spread, some of the blame likely lies with those of us who venture into the woods for business or pleasure: The disease can move on infected plants and firewood, and on the muddy shoes and bicycle tires of recreational trail users.
