large group birds of common gulls on shoreline in city lake. rivergull

chroicocephalus ridibundus horizontal freshwater shoreline rivergull coastline riverbank beautiful landscape migration undefined birdlife floating wildlife behavior flapping laridae feather seagull plumage landing amazing common scream family nature ripple animal flight flying colony large group birds gulls stone water flock fishs crowd river white avian city lake wild gull bird wing beak blue aqua life fly eat