black-legged kittiwake flying at the limestone cliffs at bulbjerg at the north sea coast of denmark

animal aves beach beak bird birds black blacklegged bulbjerg charadriiformes chordata cliff cliffs coast coastal colony denmark edge flying grey gull gulls kittiwake laridae legged limestone natural nature nest nesting north ocean ornithology rissa rock scandinavia sea seabird seagull shore thy tridactyla white wild wildlife