#larusridibundus

 Despite their name, black-headed gulls don’t have black heads. During the breeding season their heads are dark chocolate brown, and in the winter they are white with dark brown smudges on the side.
 Black-headed gulls are sociable, quarrelsome, noisy birds, usually seen in small groups or flocks, often gathering into larger parties where there is plenty of food, or when they are roosting. 

 Black-headed gull breeds in most parts of Europe and Asia, but also in coastal eastern Canada.