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The hummingbird brings a whole new meaning to the word "unique." Boasting the smallest bird in the world, this family ranges in size from the two inch long bumblebee hummingbird to the giant hummingbird, which reaches a length of eight inches. The hummer's metabolism is as powerful as the engine of a high-performance race car, its heart pumping at a stunning 1,260 beats per minute to maintain a steamy body temperature of 105 degrees F. Its mighty chest muscles account for more than one third of its weight and allow it to flap disproportionately large wings at a dizzying 50 to 200 times per second. No wonder a hummingbird sighting in a backyard garden is cause for delighted celebration. In Hummingbirds: A Beginner's Guide , award-winning writer Laurel Aziz explores these details and many more, bringing to life this tiny force of nature. Hummingbirds is illustrated throughout with stunning full color photographs.