
What place does a bird away from home hold in San Francisco?

Behind the scenes of a frenetic, 13-hour birding challenge.

Large carcasses can’t just be wiped up. What are the other options?

It took decades of work to prepare for this spring’s Northern California condor restoration on Yurok Tribal land.

“The time is ripe for biologists to unravel the diversity, ecology, and natural history of land flatworms,” one scientist writes

Erica Spotswood, the science director of the San Francisco Estuary Institute’s Urban Nature Lab, got her dissertation studying seed dispersal on the French Polynesian islands of Tahiti and Moorea. A kind of low-growing fruit tree named Miconia calvescens had arrived in Polynesia from Central America sometime in the 1930s and rapidly spread across the tropical…