• East view from Crissy Field overlook with old Coast Guard station on left and city on right

    Presidio of San Francisco

    California

Ring-billed Gull

(Larus delawarensis)
 
Ring-billed Gull
A Ring-billed Gull wades at Crissy Field.
Will Elder,NPS
 

Natural History: The Ring-billed Gull dives for fish, catches insects in the air, and also feeds on vegetation, small mammals, amphibians, reptiles, invertebrates, and garbage. It nests on open ground or near rocks from April to August.

General Distribution: In the Presidio, this species can be found in the ocean, bays, tidal sand and rock areas, and around piers and pilings.

Frequency: This species is considered common in the fall, spring and winter, and rare during the summer.

Identifying Characteristics: This gull can be distinguished by its medium-gray color with dark wing tips similar to the California Gull, except that it is smaller with a black ring encircling its bill and yellow-green legs.

Presidio Birds main page

Did You Know?

United States Capitol Building

In 1872, there was a proposal in Congress for the Presidio to become a San Francisco city park. The Army reported that 800 acres were required for national defense, provided barracks be relocated. Despite Congressman Cole's attempts, however, the Presidio reservation remained intact.