. . "No person shall hunt, take, kill or attempt to kill any duck, goose, brant, swan or other waterfowl or shore bird or wader protected by law, resting on or flying over the waters of Lake Wononscopomuc, or kill or attempt to kill any such bird within a distance of five hundred feet from the water level of said lake except that when in the opinion of the first selectman and the conservation commissio" . . . . . .