April A. (flutterby) reviewed The Audubon Society Field Guide to North American Birds: Western Region on + 142 more book reviews
One of the best of its size I've seen. The pictures are really acurate.
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The book contains hundreds of full color close up pictures of the different birds found in the western part of the country. These are cross referenced with a detailed summary of each birds description, nesting habits, range, etc. We found this to be the best 'pocket sized' reference book of its type.