Uncertain; likely a dark-colored gull or crow feather.

The image shows a single dark, elongated feather lying on stone. Its shape suggests a wing feather, but color and outline alone do not support a dependable identification of the bird.

Predominantly charcoal to black, with subtle blue-gray sheen or lighting reflections; no clear bands or spots are visible.

The vanes appear mostly tightly joined, as in a pennaceous flight feather; fine barbule condition is not discernible.

A dark central rachis runs most of the length; barbs form smooth, dark vanes, with some loose or separated edges.

Appears smooth and fairly stiff, with a slight sheen; close surface texture cannot be resolved.

Probably from a wing, based on its elongated shape and asymmetrical vanes, though a tail feather cannot be ruled out.

Dark uniform-looking vanes, a visible central shaft, and a tapered outline; none is sufficiently distinctive for species identification.

Cannot be assigned without a reliable species identification.

Cannot be determined from the feather alone.

The source species and its ecological role cannot be established from this specimen alone.

Could resemble dark flight feathers from crows, ravens, gulls, or other dark-plumaged birds; size, pattern, and rachis details are needed to distinguish them.

Feather shape and coloration can overlap widely among unrelated bird species, so reliable identification often requires scale, detailed markings, and location context.

Feathers have varied cultural and historical uses; regulations may restrict possession of feathers from native wild birds, depending on jurisdiction and species.

Photograph both sides beside a ruler and record where it was found; compare the feather with regional identification references, and avoid collecting protected feathers where prohibited.

Appears largely intact, with some vane separation or fraying; freshness and overall condition are difficult to judge from the image.