Another public part of the marsh is Grizzly Island Wildlife Area which is managed primarily for waterfowl .
Over 230 species of birds have been seen here as well as many mammals , amphibians , reptiles , and fish .
Another public part of the marsh is Grizzly Island Wildlife Area which is managed primarily for waterfowl , although over 230 species of birds have been seen here as well as many mammals , amphibians , reptiles , and fish .