Ring-billed Gull

The Ring-billed Gull is a medium gull with a white head and body, gray back, and yellow legs. Adults are distinguished by a black ring around their yellow bill. In flight, their wings show prominent black tips with white 'windows' (mirrors) at the very ends of the outer primaries.

Distinctive bicolored pattern. The distal (outer) half of the feather is deep black, while the proximal (inner) half and base are clean white/light gray. The rachis transitions from dark brown/black in the pigmented area to creamy white at the base.

Tightly interlocked pennaceous barbs throughout the vane, designed for aerodynamic flight. The trailing edge shows some loose plumulaceous barbs at the very base (superior umbilicus).

Smooth, glossy, and very stiff. The surface is water-repellent (oily) as characteristic of aquatic birds. The black tip is noticeably thicker due to melanin reinforcement.

The stark contrast between the solid black distal portion and the pure white base, combined with the extreme asymmetry, are diagnostic for an outer primary of this species.

Found near large bodies of water, including lakes, rivers, and coasts. Highly adaptable, they are also found in parking lots, landfills, and agricultural fields.

Resident across North America. Breeds primarily in Canada and the northern US (including Great Lakes like Lake Erie); winters south to the Gulf Coast and Mexico.

Scavengers and predators; they play a vital role in cleaning up organic debris and controlling insect and small fish populations. They are highly successful in human-altered landscapes.

Herring Gull (Larus argentatus) feathers are similar but significantly larger (12-14 inches). Bonaparte's Gull feathers are much smaller and have a white leading edge on the primary.

These birds are incredibly opportunistic foragers. They have been known to follow tractors in fields to eat unearthed insects, and they are famous for stealing food from humans in coastal and urban areas.

Excellent condition. The edges of the vanes are crisp and not frayed, suggesting a relatively fresh molt or a feather from a healthy bird. No visible fault bars or parasite damage.

Lake Erie Ohio