Some species, such as Bufflehead (Bucephala albeola), Common Goldeneye (Bucephala clangula), Lesser Scaup (Athya affinis), and Ruddy Duck (Oxyura jamaicensis) have diets that are almost exclusively macroinvertebrates throughout their entire lives (Hoppe and others 1986; Bendell and McNicol 1995; Thompson and Ankney 2002), while others like American Widgeon
(Anas americana) consume mostly vegetation during adulthood (Wishart 1983; Knapton and Pauls 1994).
The number of black ducks dipped slightly, from 466,000 to 444,000, but American widgeon
saw the largest decline in the Eastern survey area.
Other vulnerable birds include the endangered red knots and piping plovers that winter in coastal Florida, as well as the green-winged teal, the American widgeon
and other dabbling ducks, loons, white-fronted geese, sandpipers, turnstones, and dowitchers.
The earliest migrants include American widgeon
, gadwall and green-winged teal.
Waterfowl are also featured including the American widgeon
, black ducks, blue-winged teal, cinnamon teal, green-winged teal, gadwall, mallard, pintail, shoveler, wood duck, canvasback, greater scaup, lesser scaup, redhead, Canadian geese, and the snow goose.