A visual explanation of how fire helps release the seeds of knobcone, bishop, and Monterey pine trees, plus a fun experiment to try at home!
John Muir Laws
Urban Rat Watcher’s Guide
Rats don’t have the best reputation, but you’ve gotta respect these adaptable survivors! Here’s how to identify your city’s rats.
A Seasonal Whale Finder for California
When to find and how to identify the three whales that regularly visit the California coast.
Naturalist’s Notebook: Listen to Forest Owls
If you go into the woods and listen, you may hear great horned owl duets, the trill of western screech owls, toots of northern saw-whet owls, or the daytime call of the northern pygmy owl.
Naturalist’s Notebook: Irises Through Time
Try tracking a single iris over time.
Naturalist’s Notebook: Chestnut-Backed Chickadees
Three subspecies of chestnut-backed chickadee inhabit the Bay Area. But the populations are merging.
Naturalist’s Notebook: Gravitational Wasting
See evidence of “gravitational wasting” erosion on Bay Area hillsides.
Enjoy Mosquito-Watching All Year Round
How Water Striders Bend Light
How a Plant and an Ant Help Each Other to Survive
Vetch and Argentine ants cooperate, exchanging food for protection.