Written and illustrated by David Allen Sibley, America's most widely respected bird illustrator and ornithologist, this FoldingGuide offers instant access to just what backyard birdwatchers need to know. 69 backyard birds are covered, including descriptions, size, range, seasonal occurrence, and illustrations, all taken from the award-winning The Sibley Guide to Birds, 2nd Edition,. The Northern California region extends from the Oregon border southward to Santa Barbara on the coast and inland eastward to the Sierra Nevada range.