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 Green-winged teal PreviousNext 2018 Green-winged teal Numbers2018: 3.043 million. -16% change from last year2017: 3.605 millionGreen-winged teal are +42% over the long term average. Green-winged teal 1955-2018 Estimated Breeding Populations [chart not available] * in millions