@brinhq: The American woodcock uses a strange, dance-like motion to locate food hidden underground. By rocking its body and bobbing its head, the bird creates subtle vibrations in the soil that cause earthworms to move closer to the surface. The woodcock then detects them using sensitive nerve endings in its long bill. What looks like an unusual dance is actually a clever hunting strategy evolved to help the bird find prey beneath the ground. Source: Cornell Lab of Ornithology