Likely Canada Goose feather (also Canadian Goose)

This is a large, warm-brown goose contour feather with a distinctive fluffy aftershaft. Canada Geese are bulky, long-necked birds with black heads and necks, white cheek patches, loud honking calls, and strong, often V-shaped migratory flights.

Warm chocolate-brown to tan, becoming paler toward the base; the rachis is brown-gray. This coloration fits a Canada Goose body feather, though lighting and individual variation limit certainty.

Pennaceous upper vane with interlocking barbules; the basal portion is plumulaceous and loose, providing insulation. Barbs appear intact with no obvious specialized owl-like edges.

Straight, moderately slender rachis with dense, smooth barbs above and widely spreading downy barbs below; the vane transitions gradually into the fluffy base.

Upper vane is smooth, matte to subtly glossy and moderately flexible; basal barbs are soft, silky, and insulating.

Most consistent with the body—probably breast, flank, or undertail coverts—because of its soft downy base and symmetrical vane.

Large symmetrical body feather, brown coloration, and especially the long pale downy base distinguish it from stiff, asymmetrical wing and tail feathers.

Canada Geese occupy wetlands, lakes, rivers, agricultural fields, parks, and urban ponds, nesting near water and feeding in open grasslands or croplands.

Widespread across North America, with some populations resident and others migrating between Arctic/subarctic breeding grounds and temperate wintering areas.

Canada Geese graze vegetation, transport nutrients between wetlands and uplands, and serve as prey for large predators; abundant populations can also cause localized overgrazing and water-quality problems.

Domestic goose or other Branta species may look similar; exact identification requires locality, feather dimensions, and comparison with known specimens.

Canada Geese can migrate thousands of kilometers, use learned family routes, and often retain lifelong pair bonds.

Goose feathers have historically been used for insulation, bedding, clothing, and fishing flies; possession of wild goose feathers may be regulated under wildlife-protection laws.

Search beneath communal roosts, along shorelines, and near nesting or loafing areas during late summer molt; retain locality and photographs because loose body feathers are difficult to identify conclusively.

Appears fresh to moderately worn, with minor fraying near the base but no obvious fault bars, parasites, oil, or breakage; condition: Good.