Spotted owls are one of the most iconic threatened species in the West. But despite two decades of work to bring them back, their numbers are still declining. That may be due in part to a new threat - not from humans, but from other owls.

Spotted owls are one of the most iconic threatened species in the West. But their numbers are still declining that may be due in part to a new threat, not from humans, but from other owls.

Frank Dean, General Superintendent of the Golden Gate National Recreation Area, is the head man at the biggest urban park in the country.

Looking for ways to volunteer in San Francisco to help keep the city green?

Muir Woods National Monument Rediscovers its Natural Soundscape.