I read 2 studies on migration that were released about the same time a couple of years ago. Mr. Larry has probably also read the studies and can give chapter and verse. According to the studies ducks migrate between October 15th and November 15th. In other words if they are going to fly south for the winter they do so during this time period. They fly to their imprinted wintering ground for the winter. Once there, they may make temporary visits further south due to weather but will always return to their original wintering ground when weather permits. Now the availability of food may also require a move but after Nov 15th they will not make a new migration for food. By the end of October in the old days things would be pretty well frozen up in Canada and the US northern border states resulting in a migration between Oct 15 and November 15 further south. Now, with abundent food and habitat ducks go only far enough south to survive. All of the so called “rest stops” have become permanent wintering grounds instead of temporary stopping points. Good luck with the air cannons but until they run the ducks off or fill in the northern reservoirs with dirt, a “good year” of duck hunting in Louisiana is a thing of the past.