2018 Waterfowl Population Survey Total populations were estimated at 41 million © Melinda Garner 2018 Duck Species Breakdown Select Species Mallard Gadwall American wigeon Green-winged teal Blue-winged teal Northern shoveler Northern pintail Redhead Canvasback Scaup Scaup PreviousNext 2018 Scaup Numbers2018: 3.989 million. -9% change from last year2017: 4.372 millionScaup are -20% under the long term average. Scaup 1955-2018 Estimated Breeding Populations [chart not available] * in millions