This one goes out to a cute little bird that weighs about an ounce and can comfortably stand on a pencil eraser. The bee hummingbird feeds on nectar from small flowers. It has a size so small that it's eggs are the size of sand grains. It might seem like a harsh world for this little fellow but considering he competes with insects for food, the bee hummingbird eliminates other bigger birds from threatening its survival. These small birds use their apparent disadvantage (insular dwarfism) to their advanced, and they flourish alongside the insect community.