23
Apr
Storm-petrels are sea birds that feed on planktonic, drifting crustaceans and tiny surface dwelling fish. They do so by standing on the surface of the ocean using their webbed feet, while facing into the wind, wings raised, to catch the air currents. The air causes drag opposed to that of the water, which keeps the birds stationary (or floating slowly backwards, depending on the wind strength and water currents). In a lack of wind, storm-petrels will rapidly flutter their wings to remain above the water.
