Hummingbirds are the smallest of birds, most species measuring 3–5" in length. The smallest extant bird species is the 2" bee hummingbird, which weighs less than 0.07 oz.
They are known as hummingbirds because of the humming sound created by their beating wings which flap at high frequencies audible to humans. They hover in mid-air at rapid wing-flapping rates, which vary from around 12 beats per second in the largest species, to in excess of 80 in some of the smallest.
With over 300 species of hummingbirds known to us, here are the 10 most beautiful / amazing hummingbirds in the world.
The hummingbirds are including booted racket-tail, green breasted mango, rufous crested coquette, anna's hummingbird, long tailed sylph, violet crowned woodnymph, wire crested thorntail, marvelous spatuletail, red tailed comet, and fiery throated hummingbird.