A hummingbird can rotate each of its wings in a circle, allowing them to be the only bird which can fly forwards, backwards, up, down, sideways or sit in sheer space. 

Hummingbirds feed through a long, tube-like tongue that darts into the flower's corolla for nectar. The tongue, shaped like a "W", uses capillary action to absorb the nectar much like a paper towel absorbs water.