The red-necked phalarope is about the size of a sparrow. It will land in the water, and begin spinning around by kicking one leg harder than the other. As this buoyant cork-like bird does this, water rises from 50 cm. As the food rises, the phalarope keeps its eye on it, snapping their heads around as needed to keep from getting dizzy. Some phalaropes have been seen to feed 180 times a minute.
Some spin clockwise all the time, and some spin counterclockwise.
All are efficient masters of hydrodynamics, designed for a very specific kind of eating. Like all designs, this one testifies to a designer who marvelously endows the creatures around us with their own abundance of food.