This gull has 3 age groups, meaning it looks different in each of its first 3 years, see the bible for details. As an adult, it has a black head during the Summer and a dark patch around its eye in the Winter. It has a thick blood red beak with a black band near the tip and reddish- brown legs. Its main distinguishing feature is having all white wings, no dark or black markings, and white eyelids, seen clearly in Summer against the black hood.