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Ring-billed Gull (Common Gull, American Mew Gull)
Contour feather (body covert or scapular)

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

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

AI-generated identification · may be incorrect

Family: Laridae (Gulls, Terns, and Skimmers)

Shape
Symmetrical vane with a gently rounded tip and broad oval outline
Size
Approximately 4 to 5 inches long, consistent with a medium-sized body or scapular feather typical of a medium gull species
Learn more about Ring-billed Gull (Common Gull, American Mew Gull) in the encyclopedia →

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Description

The Ring-billed Gull is a familiar, medium-sized white and grey gull with yellowish legs and a distinct black ring around its bill in adults. They are highly adaptable scavengers often seen wheeling gracefully over parking lots, beaches, and plowed fields.

Colour & Pattern

Pale greyish-white base with a distinct brownish-grey wash or subterminal brownish mottling near the tip, typical of immature plumage or transitional molt

Barb Structure

Pennaceous at the upper distal portion with interlocking barbicels, becoming slightly more plumulaceous or frayed toward the base; barbs show noticeable wear and separation

Rachis & Barb Pattern

Central rachis is slender, white to pale straw-colored, flexible, and curved to fit the body contours; barbs are moderately dense and angled evenly

Texture & Surface

Soft yet resilient texture with a matte surface finish, lacking extreme stiffness or oily waterproofing found in primary flight feathers

Feather Placement

Body covert or scapular feather, determined by its curved contour shape, moderate size, and broad flexible vanes designed for body insulation and streamlining

Key Features

Pale grey and white coloration with a brownish tip wash, curved flexible rachis, and medium-small body contour shape

Habitat

Found near coastlets, lakes, rivers, agricultural fields, parking lots, and open landfills across North America

Geographic Range

Breeds across northern North America and winters along the Pacific and Atlantic coasts, Gulf of Mexico, and inland waterways

Ecological Role

Acts as an opportunistic scavenger and predator controlling insect and rodent populations while recycling organic waste in coastal and inland ecosystems

Similar Species

Herring Gull and California Gull, which tend to be larger with coarser or darker patterning on their body coverts

Interesting Facts

Ring-billed Gulls are known to drop hard-shelled mollusks and nuts onto pavement from high altitudes to break them open, and they readily forage in urban environments.

Cultural Significance

Gull feathers have historically been utilized in local craft and decorative items, though they were largely unaffected by the commercial millinery trade compared to larger plume birds

Field Identification Tips

Look near bodies of water, open playing fields, or coastal parking lots, especially during spring and fall migration when molted body feathers are commonly dropped

Condition Notes

Fair condition; showing noticeable wear, fraying of the barbs along the lower edges, and slight fading from exposure to the elements (Grade: Fair)