It's been countinous over the years . You don't even want to know how many show up in migratory season it puts a real cramping on our food budget for the ducks where as a months worth of food for all the ducks and my 4 buff geese only lasts about 5 days and puts a real limit on all the population of our ducks , where as I would have had the call ducks a few years ago I haven't been able to etbthem till now because the geese take over the pond .