Why don't you research previous on this particular site. Or the internet, The USFG, doesn't want it anywhere. Russian olives and autumn olives which were planted on national refuges, are singled out as being invasive species, (not native), despite there being a benefit to pheasants, they are being eradicated, to make the national wildlife refuges suitable to native species. Because pheasants are not 'native", ( you can research that too on the internet), pheasants are not factored into the native range theory, needs of habitat, etc. Neither are Huns. Only sage grouse, prairie chickens, sharptails, and of course ducks, geese, swans, etc. So whatever habitat that existed on US National Wildlife refuges that pheasants found a nitch in, will be gone with these "improvements", or drastically reduced, this generally has an affect of lower population levels. Mybe they can authorize oil drilling as well since it doesn't created pollution problems in North Dakota, or Texas wetlands, (according to you), maybe a great addition to Wildlife Refuges? Heck after a few years, it's like they have been there forever! Not like that darn corn! (your agricultural great polluter), next year of course, you can reseed native prairie on that, with no evidence being seen in a couple of years.