Likely Rock Pigeon (feral pigeon; also called common pigeon)

This gray flight feather is approximately hand-length, with a tapered outline, pale tip, and fluffy base. Rock Pigeons are sturdy, medium-sized birds with variable plumage, often showing dark wing bars and an iridescent neck; their flight is swift and direct, with rapid wingbeats.

Mostly slate gray to charcoal, with a pale gray tip and subtle darker areas or bars. Lighting and the visible surface make precise pattern and dorsal–ventral differences difficult to assess.

The vane appears tightly formed and pennaceous, with some loose, frayed barbs near the base; fine barbules are not resolvable in the image.

A slim, pale-gray central rachis runs nearly the feather’s length; barbs form a smooth, close-set vane, becoming loose around the basal down.

The exposed vane looks smooth and matte, while the base is softer and fluffy; no clear gloss or specialized edge structure is visible.

Probably from the wing: its elongated shape and asymmetric vane suggest a remex, though distinguishing a secondary from a long covert is uncertain.

The gray coloration, dark shading, pale tip, and long asymmetric form fit a pigeon-like flight feather, but these traits are not uniquely diagnostic of Rock Pigeon.

Rock Pigeons favor cities and towns, cliffs, farmland, and other open habitats, nesting on ledges and building structures.

Native to parts of Europe, North Africa, and western and central Asia; introduced and widely established worldwide. Many populations are resident.

Pigeons consume seeds and grains and are prey for urban raptors, including Peregrine Falcons. Feral populations are abundant in many cities; wild populations and local trends vary.

Mourning Dove and other pigeon feathers can look similar; size, exact banding, and vane shape may help, but this image lacks enough diagnostic detail for a confident separation.

Rock Pigeons were domesticated thousands of years ago and have been selectively bred into many varieties. Their homing ability has made them important messengers throughout history.

Domestic pigeons have served as messengers, food, and companions; pigeon feathers have also been used in crafts and fly-tying. Laws governing possession of wild-bird feathers vary by location.

Compare found feathers with reference collections and note length, pattern, and which vane is narrower; feathers near urban roosts may come from pigeons, but location alone is not proof.

The feather appears mostly intact, with some basal fraying or loose down; no obvious severe breakage or contamination is visible. Condition: good, based on the image.