Hummingbird beaks aren't just for nectar sipping. They can double as weapons in the mating game.
Scientists have been puzzled by the fact that hummingbirds maintain such a sugary diet without a sweet-taste receptor.
Mother's nature's tiny fliers still tops in aerodynamic efficiency, but small man-made birds closing fast.
Hummingbirds are remarkably successful little birds with a long and colorful history.