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Ring-billed Gull (Common Gull, American Mew Gull)
Primary flight feather (remige)

Ring-billed Gull (Common Gull, American Mew Gull)

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Charadriiformes, Family: Laridae, Genus: Larus, Species: L. delawarensis

Family: Laridae (Gulls, Terns, and Skimmers)

Shape
Slightly asymmetrical vane with a tapered, rounded tip and a smooth overall elongated outline.
Size
Approximately 7-9 inches long, consistent with an outer primary flight feather for a medium-sized gull.
Rarity
Very Common
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Description

The Ring-billed Gull is a medium-sized, highly adaptable gull recognized by its pale grey mantle, yellow legs, and a distinct black ring around its bill. They are exceptionally resourceful scavengers often found flocking near human habitation.

Colour & Pattern

Graduated monochrome color scheme transitioning from a crisp white base near the calamus through a soft grey mid-section to a distinct black tip with a clear subterminal white spot.

Barb Structure

Tightly interlocked pennaceous structure along the vane with well-developed barbicels forming a cohesive, durable surface.

Texture & Surface

Smooth, firm, and slightly glossy texture with high rigidity to withstand air resistance during flight.

Key Features

Distinctive black-tipped outer primary feather with a sharp gradient from white to grey and a solid black apex.

Habitat

Coasts, lakes, rivers, agricultural fields, and heavily human-modified environments such as parking lots and landfills.

Geographic Range

Widespread across North America, breeding primarily around northern lakes and coasts and wintering along southern coastlines, the Great Lakes, and inland waterways.

Ecological Role

Acts as an opportunistic scavenger and predator, helping cycle nutrients and control populations of small aquatic organisms and insects.

Similar Species

Herring Gull and California Gull, which tend to be larger and show different dark patterning on the wingtips.

Interesting Facts

Ring-billed Gulls are known to drop hard-shelled prey like clams and crabs onto pavement from the air to break them open.

Condition Notes

Good condition with intact barbs and minimal fraying, representing a naturally molted feather.

Ring-billed Gull (Common Gull, American Mew Gull) | Feather Identifier