Here on the Eastern Shore of the Chesapeake we had a large population of Mute swans. The Maryland Department of Natural Resources decided to "manage" them back around 2000. Oiling eggs etc did not work and they resorted to euthanizing by shooting. A friend of mine was the State waterfowl biologist at the time and they took their swan management program seriously. years later, seeing a Mute here is a rarity. Of course, there was lots of hand wringing about the "beautiful native swans", and we were very surprised that the Department got the program approved. It was a great sucess.