Hummingbirds have such moxie! Not only are they the smallest of birds, but they have mad flying skills: they can fly right, left, up, down, backwards, and even upside down. Plus, they can hover. (They're really fairies, right?) PLUS, those colors! This green-crowned brilliant hummingbird (Heliodoxa jacula) shows off his color-shifting iridescence, which is all part of the ploy to find a mate.