The Bay is increasingly threatened by human population. Pollution in the Bay kills water grasses leaving animals without food and shelter. DDT and other pesticides entering the Bay have contributed to the decline of bald eagles and other waterfowl. Researchers monitor plants and animals, track and band birds, search for sources of pollution, and work to educate the public about methods of returning the Bay to its original health. These extend across the Dakotas and Minnesota, to Manitoba, Saskatchewan, and Alberta.
Some species are redhead, canvasback, ruddy duck, northern pintail, and blue-winged teal.
Wetlands are being replaced by farms and fields. Predators include red fox, hawks, striped skunk, raccoon, and mink. Nests are disturbed by crop dusting planes, and pesticides can kill young ducks. It provides prime food sources and acts as a re-fueling station for migratory waterfowl. Wild turkey, black bear, cottonmouth moccasin, river otter, armadillo, wood duck, swamp rabbit, and barred owl.