A flock of European Herring Gull standing on a pier covered with green algae under a bridge

flock seagull gull standing green covered algae pier dock sea north sea belgian coast coastline water yacht boat nieuwpoort oostende blankenberge knokke middelkerke ocean animal bird concept cloudy day herring european europe old bridge scenic nature wildlife white sky wing wild feather natural group fauna seabird birds de panne koksijde zeebrugge