Ring-billed Gull - Photo Copyright Ward Cameron 2003 - Click to view a larger image Ring-billed Gull - Photo Copyright Ward Cameron 2003 - Click to view a larger image Ring-billed Gull - Photo Copyright Ward Cameron 2003 - Click to view a larger image Ring-billed Gull - Photo Copyright Ward Cameron 2003 - Click to view a larger image  
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Ring-billed Gull
Larus delawarensis

Gulls and Terns
Gull Family (Laridae)

Size: Length: 46-51 cm Wingspan: 122 cm

Description: Ring-billed gulls are the most common North American gull. They are a moderately common migrant, but a rare breeder in the Rockies, Because they nest adjacent to the mountains, they often wander westward. Look for a white head, breast and underside. The wings and back are gray. The outer primaries are black, tipped with white. The yellow bill has a distinctive black ring. They legs and feet are also greenish-yellow. The fan-shaped tail is white. They nest in colonies, often with other gull species, preferring isolated islands for protection. Large colonies may include as many as 10,000 nesting pairs. Nests are a shallow, grass or debris--lined depression on the ground, usually near the water and often right on the beach. Both parents take turns incubating the eggs which hatch in 23-28 days. They dabble for invertebrates, scavenge for garbage, and generally take advantage of any situation presented to it. They are similar to the California gull, which occasionally also exhibits a black ring on the bill. However California gulls also have a red patch on the lower mandible. This red patch is never present on ring-billed gulls.

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All Material Ward Cameron 2005

 

 

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