Herring Gull... Norway....."Larus argentatus"Black-headed Gull  ... "Larus ridibundus"  Begging for food.Black- headed Gulls  "Larus ridibundus"  fighting.Black- headed Gulls ...."Larus ridibundus"  fighting."The winner".........."Larus ridibundus"Black-headed Gulls  ...."Larus ridibundus" .. Mating.Herring Gull.. ....."Larus argentatus" with crab.Herring Gull... "Larus argentatus"... Crab in defence of its life.