blue-winged teal (IMAGE) Penn State Caption The researchers focused on nine duck species that have traditionally used the Prairie Pothole Region as their breeding grounds: American wigeon, blue-winged teal (shown here), canvasback, gadwall, mallard, northern pintail, northern shoveler, redhead and ruddy duck. Credit Delta Waterfowl Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.