Two Black-headed gulls on Midsummer Eve evening in Øresund.
This is how the Royal Society for the Protection of Birds defines the Black-headed gull:
Not really a black-headed bird, more chocolate-brown - in fact, for much of the year, it has a white head. It is most definitely not a 'seagull' and is found commonly almost anywhere inland. 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.
Well, at least these two northern black-headed gulls appeared to have rather black heads, and they were not the least quarrelsome and noisy. The just appeared to enjoy the peaceful and calm Nordic summer evening ...