black-legged kittiwakes - rissa tridactyla territorial dispute, yorkshire

aggression aggressive animal animalia beak beautiful bempton bill bird birdwatching black blacklegged chordata cliffface cliffs dispute england european eye feet fighting gull kittiwake kittiwakes laridae legged lemon nature nesting ornithology pelagic plumage rest rissa roost rspb seabird seagull site sparring species surrounded territorial tridactyla webbed wild wildlife yellow yorkshire