greater scaup การใช้

Greater scaup eat aquatic molluscs, plants, and insects, which they obtain by diving underwater.
Greater scaup, when moulting and during the winter, are threatened by escalated levels of organochloride contaminants.
For example, the greater scaup has a wider black nail than does the very similar lesser scaup.
Greater scaup nest near water, typically on islands in northern lakes or on floating mats of vegetation.
Migratory species include woodcock, Canada geese, redhead duck, ring-necked duck, canvasback duck, greater scaup and lesser scaup.