Because when they flap their wings it hums.
Hummingbird is the common name of hummingbirds.Bee Humming
The hummingbird.
A bee hummingbird is a species of hummingbird, Latin name Mellisuga helenae, native to Cuba, noted for being the smallest living species of bird.
An Anna's hummingbird is a species of hummingbird native to western North America, Latin name Calypte anna, named after Anna Massena, the Duchess of Rivoli.
Depending on where you are, there's a good chance you observed a hummingbird moth. It looks a lot like a large bee but flies and looks like a small hummingird with a bee body. Google hummingbird moth for pictures.
Hummingbird
hummingbird
Hummingbird... I THINK.
A zunzuncito is another name for the bee hummingbird.
Doctor bird is another name
logradic ? Family: Trochillidae
A Bee Hummingbird is a species of hummingbird, being the smallest hummingbird or even bird in the world. A hummingbird is merely a name of a type of bird with certain characteristics that set it apart from other birds like hawks, herons, songbirds and ducks.