Ring-billed Gull
The Ring-billed Gull (Larus delawarensis) is a medium-sized gull native to North America, widely known for its adaptability to human environments. It is most easily identified by the distinct black band encircling its yellow bill.
Key Characteristics:
Habitat and Distribution:
Feature Ring-billed Gull Herring Gull Common Gull
Bill Yellow with Black Ring Thicker, Yellow with Red Spot Thinner, Yellow without Ring
Legs Yellow to Yellow-green Pinkish / Flesh-coloured Yellow-green
Eyes Pale Yellow Pale Yellow Typically Dark
Key Characteristics:
- Appearance: Adults have a white head and underparts with a pale grey back. They feature yellow legs and a pale yellow eye with a red rim.
- Size: They typically measure 43–54 cm in length with a wingspan of 105–117 cm.
- Behavior: Highly social and opportunistic, they are often found in parking lots, garbage dumps, and agricultural fields. They are known for "playing" by dropping objects in flight and catching them.
- Diet: They are omnivorous scavengers, eating fish, insects, earthworms, rodents, and human refuse.
Habitat and Distribution:
- Breeding: They primarily breed near freshwater lakes and rivers across Canada and the northern United States.
- Wintering: Most migrate to the southern US, Mexico, and Central America, though some remain on the coasts or near open water in the north.
- Vagrancy: While common in North America, they are scarce visitors to Western Europe, including Britain and Ireland, where they are most frequently spotted in winter.
Feature Ring-billed Gull Herring Gull Common Gull
Bill Yellow with Black Ring Thicker, Yellow with Red Spot Thinner, Yellow without Ring
Legs Yellow to Yellow-green Pinkish / Flesh-coloured Yellow-green
Eyes Pale Yellow Pale Yellow Typically Dark