What’s a tiger swallowtail doing in downtown San Francisco?
This riparian butterfly species finds suitable habitat in the tall buildings and wide spaces of Market Street. Advocates aim to keep them there.
Urban Nature
Muir Beach closes for summer, semi-finalists picked for museum at Crissy Field
The very popular Muir Beach closed this summer to drive-ins for habitat restoration work, and other Bay Area nature news.
A Surprise Circle of Redwoods
Another father-son geocaching adventure, this time revealing a very tall trees that seem to hide in plain sight.
San Jose mostly tree-less, Yosemite expands parkland
Only 15 percent of San Jose has trees, according to study using laser tree trackers, and more Bay Area nature news.
Jack London’s oak tree dying, San Franciscans may start drinking local water
The 300- year-old oak tree outside Jack London's former cottage in Glen Ellen to be felled because of fungus, and other Bay Area nature news.
The Exploratorium’s new eyes on the bay
The Exploratorium reopened this week with a new focus on the world right outside its doors: San Francisco Bay.
Coyotes and humans without the dogs do ok, Preservation Ranch deal in the clear
Coyotes and humans coexist peacefully in Golden Gate Park -- when dogs aren't part of the picture, and other Bay Area nature news.
Back again: Great blue herons nest at Stow Lake
Great Blue Herons are back again at Stow Lake in San Francisco for the 20th nesting season.
Marin parks get more money, Annadel tamps down “outlaw” trails
Marin adds $5.2 million to county parks budget thanks to voter referendum last fall, and other Bay Area nature news.
A Festival with Legs
What has more than two thousand legs and is converging on San Francisco’s Corona Heights neighborhood? A: The parents, children, insects and arachnids who collectively take part in Bug Day at the city’s Randall Museum. Q: Who is responsible? A: … Read more
