Seagulls at sea pictures desktop wallpaper.The seagull is a medium-sized gull.The body length is 38-44 cm, the wingspan is 106-125 cm, the weight is 300-500 grams, and the life span is 24 years.As the most common seabird, seagulls have two special titles, “harbour cleaner” and “"forecaster”" of maritime navigation safety.