If you hunt ducks or upland, ducks unlimited have been a good group for conserving those lands, and they have a powerful new initiative to raise $2 billion by 2018, they're more than half way there. If you can donate to them, from what I've seen they are a great waterfowl group:
http://www.ducks.org/how-to-help/rescue-our-wetlands?poe=homebanner
http://www.ducks.org/how-to-help/rescue-our-wetlands?poe=homebanner
