The sound of a dawn chorus recorded at Wiley Glade in California's southern Mendocino National Forest.

The sounds of where granite mountains meet a volcanic range.

The sounds of crickets and bullfrogs in California's Sierra foothills.

The sounds of an open grassy meadow in a giant Sequoia grove.

The sounds of Tioga Pass, the highest mountain pass in California.

The sounds of migratory birds in California's Trinity Mountains.

This is a recording from a hot and dry oak forest at a lower elevation in Sequoia National Park.

Great Basin spadefoot toads make a deep, guttural sound near Mono Lake on the east side of California.

Mesquite Spring in Death Valley can be incredibly quiet, but in this recording it's filled with the sound of quail, sparrows, and hummingbirds.