young gull in front of alcatraz prison in san francisco, yellow-legged gull

alcatraz alone animal aquatic architecture area background bay beak beautiful bird blue bollard bright brown california city closeup cloudy coast colors destination detail dukdalf embarcadero famous feather feet first float francisco gull harbor herring immature isolated juvenile landmark life marine national natural nature ocean outdoor pier plumage portrait pretty profile railing refuge san sea seabird seagull sitting sky suspension tourism travel usa vacation view water waterfront wharf white wild wildlife wings young