One of my favorite kleptoparasites is the American Wigeon. If you are wondering, a kleptoparasite is an organism that steals food from another. Usually, I see wigeons stealing food from coots, but I have observed them taking food away from many species, often other ducks. However, this morning the wigeons were all foraging for themselves. Perhaps, a great wave of industriousness has overtaken the wigeon population or perhaps, there weren't any coots to take advantage of?  Anyway, they are fun and beautiful to watch even when they aren't pestering other birds.