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.
Did You Know?
Major Jonathan Letterman--after whom the hospital at the Presidio was renamed in 1911--was the medical director of the Army of the Potomac. A founding father of military medicine, Letterman organized forward first-aid stations, mobile field hospitals, and ambulance services during the Civil War.