The bee hummingbird (Mellisuga helenae) is a species of hummingbird that's native to Cuba. It's not only the smallest warm-blooded animal on Earth, but it's also one of the most fascinating creatures in the animal kingdom. With a length of about 2.25 inches (5.5 cm) and a weight of around 0.06 ounces (1.7 grams), this tiny bird is a marvel of nature.The bee hummingbird's incredible size is just on...More