A new settlement will speed up the U.S. Fish and Wildlife Service decision on whether the animals warrant Endangered Species Act protection. The agency is now required to make that decision by April ...

A well-studied example of a ring species is the salamander Ensatina escholtzii ... Still farther to the north, in northern California and Oregon, the two populations merge, and only one form ...

With its wide mouth charmingly outlined in yellow, the California tiger salamander always looks like it's smiling. But this beautiful amphibian is a discriminating species that can only thrive in ...

Northern California's Sáttítla Highlands are a testament to the region's volcanic past, with the landscape dramatically ...

A three-inch-long fish is at the center of a political debate over wildfire management in California as deadly blazes continue in Los Angeles.

A large swath of far Northern California has been established as one of California’s newest national monuments on Tuesday ...