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Backyard Birdsong Guide to Western North America drinkware light green foliage creates aWith more than 300,000 copies already sold, Backyard Birdsongs is back by popular demand. The Cornell Lab of Ornithology is proud to rerelease this widely acclaimed bird audio field guide series, from award winning ornithologist and author Donald Kroodsma. Suitable for beginning bird watchers, Backyard Birdsongs is an interactive handbook of birds and their songs. With a touch button electronic module that contains common vocalizations of seventy five