Resources – Birds
The Audubon Society has lots of resources on their website plus a searchable Native Plants by zip-code database for finding native plants in your area.
Bird feeders, birdhouses, and other related items: Audubon Workshop.
High-quality mailorder birdseed: Wingin' It.
Wild Birds Unlimited has a few stores in Southern California.
Doug Aguillard's web site - The Birds, Butterflies, and Dragonflies of San Diego - has great photos.