Mallard (Mallard Duck)

This is a characteristic speculum feather from a Mallard. Mallards are medium-sized ducks where males feature a glossy green head and females are mottled brown. Both sexes possess this brilliant blue wing patch, though the female's is often slightly less wide.

Striking iridescent cobalt blue to violet on the outer vane, bordered by a sharp black subterminal band and a crisp white terminal tip. The inner vane and base are a neutral brownish-grey.

Tightly interlocked pennaceous barbs in the iridescent and grey regions to provide a stiff, aerodynamic surface; plumulaceous (fluffy) barbs at the base for insulation.

Smooth, glossy, and oily on the iridescent speculum portion for water repellency; the grey inner vane has a more matte, velvety texture.

Brilliant iridescent blue-violet color, distinct black border followed by a white tip, and a significant asymmetrical shape typical of flight feathers.

Found in almost any wetland habitat, including lakes, rivers, ponds, marshes, and urban parks with water sources.

Widespread across the Northern Hemisphere (North America, Europe, Asia); introduced and common in Australia, New Zealand, and South America; migratory in colder northern regions.

Generalist omnivore that aids in nutrient cycling in wetlands; serves as a primary prey species for various raptors and mammals.

American Black Duck (darker overall with subtle purple speculum), Northern Shoveler (blue-grey coverts but speculum is green), and Wood Duck (finer white tipping and different blue hue).

The iridescent blue of the speculum is a structural color, meaning it is created by light interference rather than pigment alone; Mallards are the ancestors of almost all domestic duck breeds.

Excellent condition with intact margins, suggesting it was naturally molted. No signs of stress bars or significant wear from flight.