Ben Andrew/RSPB/PA The adult gull has a white head and breast, with the black back that gives it its name The great black-backed gull is on the UK Red List and is considered a species of ...

Medium-size, 3-cycle gull with sloping head, medium-size bill. On adult, note yellow legs, pale eyes, and neat “ring bill.” Breeding adult: pale gray upperparts; black wing tip with white ...