All you ever wanted to know about king greenhead in this 4 part series about the History of the North American Mallard. Species split into black ducks, mottled ducks, Mexican ducks, and the greenheaded mallard. With 14 mallard like ducks across the globe the greenheaded mallard is the most widespread. We start out with a quick update on the Polar Vortex for our weather nerds, clean up some mallard mis-information still floating around, and then jump into the early evolution of the mallard in North America.