The European herring gull (Larus argentatus) is a large and robust seabird, with a length of up to 66 cm (26 inches). It is a familiar sight along the coastal regions of Western Europe and is known for its striking appearance and adaptability to various environments.
Adult European herring gulls have a light grey back and upper wings, with a white head and underparts. Their wingtips are marked with black and white spots known as "mirrors." The bill is a bright yellow with a red spot near the tip, and the legs are typically pink, although they can sometimes be yellowish. Juveniles are mottled brown with darker streaks and possess a dark bill and eyes. As they mature, their plumage gradually lightens, reaching full adult coloration and sexual maturity at around four years of age.
