seabird prints of a beach covered in shells on the wadden sea near dornumersiel in germany in autumn

algae beach biology blue closeup cloud coast detail diversity dornumersiel dune environment environmental europe european famous fauna flats flora frisian german germany grass intertidal island lichen low moss mud north ocean prints sand sea seabird seafront seagull seascape seaside sediment shell shore tidal wadden water wattenmeer wet wetlands wild zone