Large dark waterbird, possibly a cormorant; exact species cannot be identified confidently from this feather alone.

A large, dark feather with a conspicuously pale shaft and rounded end. Its plain coloration and shape are compatible with several waterbirds and do not securely identify the source species.

Uniform dark brown to nearly black, with a pale whitish shaft and downy base; no obvious bars or spots. Lighting and wear can alter apparent color.

Mostly intact, tightly joined pennaceous vanes, with loose downy barbs near the base; no clear aftershaft is visible.

Straight, pale rachis that darkens toward the vane; barbs lie obliquely and form a close, smooth surface.

Smooth, matte to subtly lustrous, with a stiff vane and soft, fluffy basal portion.

Probably from the wing, based on its length and asymmetry; a large contour feather is also possible.

Dark, unpatterned vane; pale rachis; long, tapered outline and downy base. These traits are not species-diagnostic.

If from a cormorant, likely associated with lakes, rivers, estuaries, and coasts, where it nests in colonies near water.

The possible Double-crested Cormorant is widespread across North America, with regional migration and year-round populations in milder areas.

If a cormorant, it is a fish-eating predator and colonial nester; populations and local effects vary by region. The feather alone cannot indicate species status or ecological context.

Raven, turkey, goose, and other cormorant feathers can look similarly dark; size, shaft color, vane asymmetry, and comparison with known specimens are needed to distinguish them.

Cormorants dive underwater to catch fish and often hold their wings out to dry after foraging; their plumage is less water-repellent than that of many diving birds.

Feathers have historically been used in crafts and fishing, but possession of wild-bird feathers may be regulated. In the United States, many native bird feathers are protected under the Migratory Bird Treaty Act.

Record the find location and photograph both sides beside a ruler. Look for associated birds or roosts, but use a regional feather guide or expert review before assigning a species.

Appears largely intact, with slight fraying or wear at the tip; overall condition good. No obvious fault bars or contamination visible.