What do you want to know about the natural world? Thanks to donations from readers like you, Bay Nature has teamed up with the naturalists at the California Center for Natural History to answer your questions about the world every other Tuesday. Some questions find their way to naturalist Michael Ellis, whose answers appear in our quarterly print magazine. Email us your questions at atn@baynature.org!

robin cup nest

How Do Birds Know How to Build Nests?


There are 10,000-plus species of birds in the world, about 1,100 species in the United States, and 350 or so in the greater Bay Area, so there is great variability in nests. But the basic purpose of any nest is … Read more

dungeness crabs

What Happened to Commercial Crab Season?


Why couldn’t I buy live crabs this Thanksgiving? Whether or not you choose to use your carnassial teeth for their intended purpose, eating Dungeness crabs (Metacarcinus magister) is something of a regional tradition around the holidays. A “crab feed” is … Read more