Black headed gull sits on the railing by the lake

bird seagull water wing wildlife animal nature sea grey feather plumage white coast lake behaviour sitting ocean beak birdwatching gull waterfowl black headed horizontal wild adult beauty in nature migratory ornithology wetland outdoor rural scene black headed gull chroicocephalus ridibundus ridibundus balance flying looking at camera movement posture rest splash standing calm coming curiosity demonstration hunting insect