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Ring-billed Gull (Common Gull, American Ring-billed Gull)
Contour feather, likely from the upper breast or scapular region

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

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

Family: Laridae (Gulls, Terns, and Skimmers)

Shape
Symmetrical oval-to-obovate vane with a smoothly rounded tip
Size
Approximately 2.5 to 3 inches long, consistent with a large body contour feather for a medium-sized gull species
Rarity
Very Common
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Description

The Ring-billed Gull is a medium-sized, highly adaptable gull recognized by its pale grey back, white head and underparts, black-tipped wings with white spots, and a distinctive dark ring around its yellow bill. They are extremely common around inland water bodies and human-altered landscapes.

Colour & Pattern

Predominantly pure white overall with a distinctive subterminal brown-to-grey mottling or shaft streak extending along the central upper vane, indicative of subadult plumage or seasonal mantle markings

Barb Structure

Pennaceous upper vane with tightly interlocked barbs transitioning smoothly into a soft, plumulaceous base with wispy, non-interlocking barbs

Texture & Surface

Soft and silky at the base for insulation, becoming smooth, slightly glossy, and firm along the upper pennaceous vane for water resistance

Key Features

Pure white background coloration with characteristic brownish-grey shaft streaking near the tip, symmetrical rounded shape, and fluffy plumulaceous base

Habitat

Coasts, lakes, rivers, agricultural fields, open country, and heavily human-modified environments like parking lots and garbage dumps

Geographic Range

Widespread across North America, breeding mostly in the northern US and Canada, and wintering along both US coasts, the Gulf of Mexico, Central America, and the Caribbean

Ecological Role

Acts as an important scavenger and opportunistic predator, helping clean organic waste while serving as an indicator species for aquatic ecosystem health and coastal habitat changes

Similar Species

Other gull species such as the Herring Gull or California Gull, which can be distinguished by larger overall size, heavier feather dimensions, and different grey or white patterning shades

Interesting Facts

Ring-billed gulls are notorious urban opportunists, frequently gathering in large numbers in shopping mall parking lots and fast-food drive-thrus to scavenge for discarded food

Condition Notes

Good condition, with intact barbs and minimal fraying, showing standard wear typical of a naturally molted body feather