Visual stimuli can cause the light-fliers to falter when they're feeding.
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.