Bird watchers everywhere flock to Cuba to see the world's smallest flier, the Bee hummingbird. This radiant bird is just 5 centimeters long and weighs 2 grams. It also builds the world's smallest nest and lays eggs the size of coffee beans. But don't let the colorful charmer fool you! It's extremely territorial and doesn't take kindly to intruders. Our cameras captured the male's courting dance for the first time, though the object of his affection wasn't nearly as impressed as we were!