
San Francisco wants to rebuild Alamo Square’s irrigation system, but historian says leaks are natural springs.

“Unusual morbidity event” among sea lion pups this year, and other Bay Area nature news.

Limits on commercial dog walkers in the Presidio has some nature lovers questioning: Should they be allowed at all?

Hives run out of room, bees swarm. Time to call your friendly, local beekeeper, and other Bay Area nature news.

Tim Hastings wrote to us wondering about “many large round, almost ‘dinosaur-egg’ like rocks dotting the muddy sands” when he was hiking the Estero Trail. Tim’s guess is that the soft rock is susceptible to erosive shaping during the rise and fall of tides; thus the almost uniform rounded, oval shape of these small boulders. That’s…

Imagine fitting your little eggs inside a nest the size of a golf ball? Hummingbirds are back, and raising the next generation.