I once sat on the same pond in Nebraska for 42 days straight because every ten days the birds got hit with a storm and shoved back to squaw creek and had to migrate past us over and over again and never seemed to get any better at figuring out the spread. I think the worst day on that pond was a 9 bird shoot on the last day which was nine more then our other two spreads got on that crappy day. By that point the birds got a clear window and within 24 hours we went form decent numbers to couldn't find a bird in the whole area.