1.Hummingbird is the smallest bird in the world.
2.There are almost 330 species of Hummingbirds.
3.There are small and big species of Hummingbirds. The big one is called Huge Hummingbird which has 21,6 cm length. The small Hummingbird is called Bumblebee which has 2g weight and 7cm length.
4.Hummingbirds have American origin.
5.Hummingbirds are the only birds which can fly backwards.