Get a field guide to Northern California birds to identify species like this great egret. (Photo by Mick Thompson) For most people, that is plenty of bird knowledge.

The habitat supports more than 300 bird species and 40 types of mammals, and is a major rest-stop for migratory birds coming up the Pacific Flyway. ... While in Northern California, ...

Condor populations all but disappeared by the end of the 1960s due to poaching and poisoning, and in 1967 the California condor -- which can live for 60 years-- was listed as an endangered species.

The endangered California condor, the largest native North American bird, returned to soar the skies over the state's far northern coast redwood forests for the first time in more than a century.