The bee hummingbird is one of the most amazing and unique birds in the world, and is truly a marvel of nature. Weighing in at less than 2 grams, it is not only the smallest bird in the world, but also the smallest warm-blooded vertebrate on Earth. Despite its tiny size, the bee hummingbird has a metabolism that is ten times faster than that of a human, and can flap its wings up to 80 times per second, making it the fastest wing-beating bird in the world. Its aerial acrobatics are truly breathtaking, and it is able to hover in mid-air and fly forwards, backwards, and even upside down. But perhaps most amazing of all is the bee hummingbird’s ability to survive in a harsh environment where food is scarce, by slowing down its metabolism to conserve energy and entering a state of torpor at night.