Least Concern — widespread with stable populations in many regions.

58–72 cm in length with a wingspan of 78–97 cm; a large, slender duck with a long, narrow serrated bill and streamlined body.

Migratory species; breeds across North America, Europe, and northern Asia.

Winters in southern parts of its range, including parts of India, Europe, and the United States, favoring ice-free waters.

Typically April to June.

Nests in tree cavities, cliff crevices, or nest boxes near water; clutch usually 6–12 eggs; female incubates while male leaves after early stage.

Prefers rivers, lakes, reservoirs, and coastal waters; usually found in clear freshwater bodies rich in fish.

Primarily fish, along with aquatic insects and crustaceans; hunts by diving underwater.