Where we hunt at Chesapeake Bay lower Western Shore, they are the trophy diver. Mr. green head only shows when every thing is iced up and he won't decoy very easily either. Cripple one and you got a chase on your hands and I have seen it cost ten shells to get the bird. Most go on the wall if you are lucky to get one. The wariest and smartest duck of all, he has forgotten more than any black duck will ever know as far as escape tactics are concerned. Every one around here knows he is one SOB to get!