
Ring-billed Gull (alternate: Common Gull)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Charadriiformes, Family: Laridae, Genus: Larus, Species: Larus delawarensis
Family: Laridae (Gulls, Terns, and Skimmers)
- Shape
- Highly asymmetrical vane, elongated, tapered toward a rounded tip, slight emargination on the leading edge
- Size
- Estimated 18-22 cm (7-8.5 inches) in length, consistent with the outer primaries of a medium-sized gull
- Rarity
- Very Common
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Description
This is a primary flight feather from a Ring-billed Gull, a medium-sized gull with a white head and body, grey wings, and a yellow bill with a distinctive black ring. This feather provides the necessary thrust and lift for their agile flight.
Colour & Pattern
Solid charcoal to blackish-brown upper portion transitioning to a slightly lighter grey at the base; the ventral surface is more matte and lighter than the dorsal surface
Barb Structure
Tightly interlocked pennaceous structure for aerodynamic flight, plumulaceous at the base near the calamus, barbs are intact and well-organized
Texture & Surface
Smooth, stiff, and somewhat glossy on the dorsal side; the leading edge is very rigid to withstand air resistance during the downstroke
Key Features
Deep black pigmentation, strong asymmetry between the leading and trailing vanes, and a robust pale rachis typical of Larids
Habitat
Coastal areas, lakes, rivers, estuaries, and increasingly in urban settings like parking lots and landfills; Renée Lévesque Park provides ideal shoreline habitat
Geographic Range
Breeds across Canada and the northern US; winters south to Mexico and the Caribbean; highly migratory but common year-round in southern Quebec near open water
Ecological Role
Opportunistic omnivore and scavenger; plays a vital role in cleaning up organic debris but can impact other waterbird colonies through egg predation
Similar Species
Herring Gull (larger, similar pattern), American Crow (more iridescent, different rachis color), Ring-necked Pheasant (secondary feathers differ in shape)
Interesting Facts
Ring-billed Gulls are the most widely seen gulls in North America. They have such high site fidelity that they often return to the exact same nesting colony year after year.
Condition Notes
Excellent condition; the feather appears freshly molted with minimal wear or 'fault bars,' suggesting a healthy diet during the growth period
Notes
At the Renée Lévesque parc.