Hard to say for sure, but I think it's a matter of time, money, and effectiveness. Iowa has about 1.5% of it's land devoted to public area if I remember correctly. And farmers are expanding their properties which takes a toll on natural habitat. So they could relocate the birds, but there's no guarantee that they'll survive a winter, the downsized habitats, etc. I think it would be worth a shot in areas, but I also understand it's not the same as say, stocking fish. And while I would be okay with taking a season off, those who live where numbers are good may not be happy. It is interesting to note that the daily limit is 3 where it's 2 in Minnesota and Missouri at the moment. I don't really know how often it's considered though. I do know that I would love to see more birds in the area again.