Fluke or Fixture

 • 

An increasing number of gray whales have been spotted in San Francisco Bay in recent years. Why are these aquatic giants venturing here now in greater numbers? Are they temporary refugees? Or are they adding a regular stop on their 10,000-mile-long migration route?

Sonar Testing and Gray Whales

 • 

In mid-November, a federal judge gave the U.S. Navy permission to test its Low-Frequency Array (LFA) sonar in the western Pacific Ocean. The system transmits sounds up to 215 decibels, approximately equivalent to the noise of an F-15 fighter jet … Read more

Book Review: Inland Fishes of California

 • 

by Peter Moyle University of California Press, 2002 502 pages, $70 In this revision of his 1976 classic, biologist Peter Moyle has once again collected in one place the information available on California’s inland fishes and created a masterful snapshot … Read more

The Call of the Rails

 • 

The Bay Trail through the Palo Alto Baylands is among the best places to see the endangered California clapper rail and multitudes of other shorebirds.

Learning More About Ravens

 • 

To learn more about ravens, you might first dive into a field guide—Audubon, Golden, Peterson, Sibley, among others. In addition to a clear, concise description of your bird in question, most field guides will point to distinguishing features (in the … Read more

Salt Ponds Restoration Report

 • 

As you have probably heard, 16,500 acres of salt ponds in southern San Francisco Bay will soon be purchased from Cargill Salt and handed over to the Don Edwards San Francisco Bay National Wildlife Refuge. This historic purchase, funded by … Read more

The Raven Returns

 • 

Considered one of the smartest and most adaptable birds in the sky, ravens are as comfortable dining on garbage as on endangered snowy plovers. After dwindling for decades, raven populations have rebounded throughout the Bay Area, bringing with them a touch of wildness to our urban lives.

Banana slugs finding love.

Why are Banana Slugs so Slimy?

 • 

Back when I used to teach children about nature, I often relied on a “hook” to keep them focused. Slapping myself with stinging nettle was a great attention grabber, but banana slugs worked just as well and didn’t hurt as … Read more