close-up of the the ring-billed gull looking at the sea at san francisco, usa

america animals avian beach beak bill billed birding birds birdwatching black blue closeup dock family fauna feathers feeding flight flying fowl francisco gray grey gull gulls nature north ornighology ornithology outdoors pacific plumage ring ringbilled san scavenger sea seabird seagull seagulls shore species usa water waterbird white wild wildlife wings yellow zoology