Black-headed Gull Chroicocephalus ridibundus
The species occurs annually, but sparsely in the summer months (April-August), most frequently during the spring season in the second half of May. No recordings are made in the autumn.
Occurred more frequently in the 1990s, when the breeding populations in northern Europe were larger than they are today.
Usually seen in close to beaches and tide water areas close to the settlements. Has been found breeding once on an islet on the Nordenskiöld coast, West-Spitsbergen, and an attempt of breeding has been recorded in the lower part of Adventdalen close to Longyearbyen.