12 ounce Hummerfest Hummingbird Feeder: Is there anyone who hasn't seen the sheer beauty of a Hummingbird feeding at a spring flower, or seen films of these magnificent flyers? If so they have missed one of the most spectacular and enthralling displays of aerial acrobatics. These tiny birds hover over a flower, dipping their slender beaks into the blossom to retrieve a golden drop of sweet nectar. Their antics and acrobatics can not be forgotten. Watch as they dart and sway to take tiny sips of the food you provide. See their colors change as they move around the feeder, see their wings in constant motion and wonder how they can sustain such action. You play a big part in their lives as you feed them the nutrients which keep them flying and returning to your feeder.