QUOTE : Snakebird (colloquial): any bird of the genus Anhinga, so called for its serpentine neck. A predatory waterfowl able to alter its natural buoyancy when in water, sometimes showing only its head above the surface. Generally silent. Subsists on fish, which it impales upon its sharp, piercing bill. Often seen with wings upraised and outstretched in a fan over its head, for which reason it is often confused with a related species, the cormorant.