Don Edwards S. F. Bay Wildlife Refuge
Birds of California Field Guide; By Stan Tekiela
Stan not only features clear photos of male, female, and seasonal variations of local birds classified by color; but also organizes all key information about the birds on a single page next each picture. He clarifies differences between easy-to-confuse species and and does it all in a format that fits in your cargo pants pocket. Great guide for California birders!
GoPro with Dive Housing
Capture those underwater critters on HD video or stills with GoPro. The dive housing further improves picture quality underwater. Many of the marine photos on critter directory were taken with a GoPro.
Check them out: http://gopro.com/