I'm on a roadtrip with my sister...left today and ended up in Bismarck, North Dakota. Rained all day but cleared up a little in the evening. Who knew there was so much water in N.D. A couple sizeable lakes and these marshy areas they call potholes all over the place. Stopped at one and saw a Golden Eagle, Bald Eagle, Pelicans, Sea Gulls, Snowy Egret and some kind of Grebe. They saved the day. I won't be around to comment much for awhile...internet is spotty at best at times.
Prairie potholes are depressional wetlands (primarily freshwater marshes) found most often in the Upper Midwest, especially North Dakota, South Dakota, Wisconsin, and Minnesota. This formerly glaciated landscape is pockmarked with an immense number of potholes, which fill with snowmelt and rain in the spring. Some prairie pothole marshes are temporary, while others may be essentially permanent.