Mallard (Green-winged Teal or Northern Shoveler possible)

This is a secondary flight feather from the wing of a dabbling duck. It features a brilliant patch of structural iridescence called the speculum, which serves as a visual signal during flight. Mallards are medium-to-large ducks where the male has a iconic green head and the female is mottled brown, though both possess these iridescent wing feathers.

Striking iridescent emerald green on the outer vane, bordered by a dark blackish-brown to charcoal grey. The base of the feather shows a lighter, creamy or white band typical of many 'Anas' species.

Densely pennaceous in the iridescent region for structural color; plumulaceous (downy) at the very base (calamus area); barbs are tightly interlocked.

Smooth and glossy on the green iridescent surface; stiff and wind-resistant; waxy/waterproof coating typical of waterfowl.

Bold iridescent green outer vane, dark inner vane, blunt tip, and the characteristic duck-family stiff rachis.

Freshwater wetlands, lakes, rivers, marshes, and urban ponds (frequently found in zoos and parks).

Globally distributed; a year-round resident in much of North America, Europe, and Asia; northern populations migrate south in winter.

Dabbling ducks are essential for seed dispersal in wetlands and serve as an important food source for apex predators like eagles and foxes.

Green-winged Teal (much smaller feather), Northern Shoveler (similar color but different border patterns), and Wood Duck (iridescence often more blue/purple).

The green color is not caused by pigment but by microscopic structures in the feather barbs that reflect light, meaning the shade can change depending on the angle of the sun.

Fair to Good; the feather shows significant separation of the barbs ('zipped' apart), likely due to mechanical wear or handling after being molted.

Zoo