Mallard (Wild Duck)

This feather comes from the Mallard, a large dabbling duck. Drakes (males) are famous for their metallic green heads and yellow bills, while females are mottled brown. This specific feather creates the vibrant blue-purple patch on the wing used in displays and species recognition.

Strikingly bicolored: a deep, iridescent purple-to-blue section on one side of the rachis (outer vane) and a matte brownish-grey on the other and at the base. Iridescence is structural, changing with the angle of light.

Densely packed and pennaceous (interlocked) to create a smooth, air-resistant surface for flight. The iridescent section has specialized barbule microscopic structures to reflect light.

Smooth, glossy, and somewhat oily; ducks possess a uropygial gland that provides oils for waterproofing, which is evident in the feather's waxy feel and sheen.

The most diagnostic feature is the intense iridescent purple/blue patch on the outer vane, contrasted with a grey-brown base and inner vane.

Highly adaptable; found in wetlands, lakes, rivers, marshes, estuaries, and urban parks with ponds.

Found throughout the Northern Hemisphere (North America, Europe, Asia) and introduced to many areas in the Southern Hemisphere. Many populations are migratory.

Generalist consumer; they act as seed dispersers for aquatic plants and are a primary prey source for various predators like hawks and foxes.

American Black Duck (Anas rubripes) has a similar speculum but usually more blue; Blue-winged Teal feathers are much smaller with a light blue covert patch rather than a purple secondary.

Mallards are the ancestors of almost all domestic duck breeds. Their 'speculum' is used to signal to other ducks during flight and social displays.

Good condition. The barbs are mostly intact, though there is some light separation (splitting) on the trailing edge, likely due to natural wear or the molting process.