Strong notes of oak

The Backyard Naturalist Series at Bouverie Preserve continues Saturday, Oct. 13, with a focus on native oaks. Of the 10 species that occur in Sonoma County, Boueverie is home to nine of them, making the 535-acre preserve a perfect outdoor classroom in which to learn about them. Biologist Jeanne Wirka provides an overview of Sonoma County oaks and oak woodlands, including detailed hands-on training in oak identification using leaves, acorns, and other clues. Bring water and a snack. 9:30 a.m. to 2 p.m. $25. 13935 Hwy, 12, Glen Ellen. Advance registration required at 415.868.9244.