Northern pintails are long, slender ducks with long, narrow wings, earning them the nickname “greyhound of the air.” Pintails are named for their elongated central tail feathers, which constitute one-fourth of the drake’s body length. Male northern pintails have a chocolate-brown head with a white stripe on each side of the neck extending up from the white breast and belly. The back is blackish-gray and the rump has a white patch on each side. Two of the long central tail feathers are black while the others are gray margined by white. In flight, an iridescent greenish-black speculum is displayed. The bill is blue-gray with a black stripe along the center to the tip, and the legs and feet are slate-gray. Female northern pintails have a dark-brown upper body with a buff or gray head and lower body. The speculum is a dull brown or bronze. The bill is blue-gray blotched with black, and the legs and feet are slate-gray.
