​If someone at a park is feeding bread to ducks, chances are there are Mallards in the fray. Perhaps the most familiar of all ducks, Mallards occur throughout North America and Eurasia in ponds and parks as well as wilder wetlands and estuaries. The male’s gleaming green head, gray flanks, and black tail-curl arguably make it the most easily identified duck. Mallards have long been hunted for the table, and almost all domestic ducks come from this species.

The Wood Duck is one of the most stunningly pretty of all waterfowl. Males are iridescent chestnut and green, with ornate patterns on nearly every feather; the elegant females have a distinctive profile and delicate white pattern around the eye. These birds live in wooded swamps, where they nest in holes in trees or in nest boxes put up around lake margins. They are one of the few duck species equipped with strong claws that can grip bark and perch on branches.

The little Green-winged Teal is the smallest dabbling duck in North America. The natty male has a cinnamon-colored head with a gleaming green crescent that extends from the eye to the back of the head. In flight, both sexes flash deep-green wing patches (specula). Look for them on shallow ponds and in flooded fields, and listen for the male’s decidedly non-duck like whistle. These common ducks breed along northern rivers; wintering flocks can number as many as 50,000.

Pairs and small groups of this tiny dabbling duck inhabit shallow ponds and wetlands across much of North America. Blue-winged Teal are long distance migrants, with some birds heading all the way to South America for the winter. Therefore, they take off early on spring and fall migration, leaving their breeding grounds in the United States and Canada well before other species in the fall.

With a gleaming cinnamon head setting off a body marked in black and business gray, adult male Redheads light up the open water of lakes and coastlines. These sociable ducks molt, migrate, and winter in sometimes-huge flocks, particularly along the Gulf Coast, where winter numbers can reach the thousands. Summers find them nesting in reedy ponds of the Great Plains and West. Female and young Redheads are uniform brown, with the same black-tipped, blue-gray bill as the male.

A large diving duck, the Canvasback breeds in prairie potholes and winters on ocean bays. Its sloping profile distinguishes it from other ducks.

Slim and long-necked, the Northern Pintail has a distinctive silhouette. The male is easy to identify by his striking markings and long tail, but even the female can be recognized by her graceful, long-necked shape.

Ruddy Ducks are compact, thick-necked waterfowl with seemingly over sized tails that they habitually hold upright. Breeding males are almost cartoonishly bold, with a sky-blue bill, shining white cheek patch, and gleaming chestnut body. They court females by beating their bill against their neck hard enough to create a swirl of bubbles in the water. This widespread duck breeds mostly in the prairie pothole region of North America and winters in wetlands throughout the U.S. and Mexico.

A buoyant, large-headed duck that abruptly vanishes and resurfaces as it feeds, the tiny Bufflehead spends winters bobbing in bays, estuaries, reservoirs, and lakes. Males are striking black-and white from a distance. A closer look at the head shows glossy green and purple setting off the striking white patch. Females are a subdued gray-brown with a neat white patch on the cheek. Bufflehead nest in old woodpecker holes, particularly those made by Northern Flickers, in the forests of northern Nor

The male Common Goldeneye adds a bright note to winter days with its radiant amber eye, glistening green-black head, and crisp black-and-white body and wings. The female has a chocolate brown head with the same bright eye that gives this species its name. These distinctively shaped, large-headed ducks dive for their food, eating mostly aquatic invertebrates and fish. They nest in tree cavities in the boreal forest of Canada and Alaska; look for them on large rivers, lakes, and Atlantic, Pacific,

In a world where male ducks sport gleaming patches of green, red, or blue, the Gadwall’s understated elegance can make this common duck easy to overlook. Males are intricately patterned with gray, brown, and black; females resemble female Mallards, although with a thinner, darker bill. We don’t tend to think of ducks as pirates, but Gadwall often snatch food from diving ducks as they surface. This widespread, adaptable duck has dramatically increased in numbers in North America since the 1980s.

Formerly known as Oldsquaw, the Long-tailed Duck breeds in the Arctic and winters along both coasts of North America. It is distinctive among ducks in plumage, molt sequences, foraging behavior, and vocalizations.

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The male Ring-necked Duck is a sharply marked bird of gleaming black, gray, and white. Females are rich brown with a delicate face pattern. At distance, look for this species’ distinctive, peaked head to help you identify it. Even though this species dives for its food, you can find it in shallow wetlands such as beaver swamps, ponds, and bays. Of all the diving duck species, the Ring-necked Duck is most likely to drop into small ponds during migration.

The greater scaup (Aythya marila), just scaup in Europe or, colloquially, "bluebill" in North America, is a mid-sized diving duck, larger than the closely related lesser scaup. The male of which has a black head with a green or purple gloss.

Perhaps the most outwardly distinctive of the dabbling ducks, the Northern Shoveler inhabits wetlands across much of North America. Its elongated, spoon-shaped bill has comblike projections along its edges, which filter out food from the water.

A common and increasingly abundant duck, the American Wigeon breeds in northwestern North America and is found throughout the rest of the continent in migration and in winter. Its small bill and the male's white forehead, as well as certain aspects of nesting and feeding behavior, distinguish this species from other dabbling ducks.

The American Black Duck hides in plain sight in shallow wetlands of eastern North America. They often flock with the ubiquitous Mallard, where they look quite similar to female Mallards. But take a second look through a group of brown ducks to notice the dark chocolate-brown flanks, pale grayish face, and olive-yellow bill of an American Black Duck. Numbers of this shy but common duck declined sharply in the mid-twentieth century. Hunting restrictions have helped to stabilize their numbers, alth