GREAT BLACK-HEADED GULL. Lams ichthyaetus. 



Accidental visitor ; only one British record (Devonshire) . Central Asian 

 species, breeding from the Caspian Sea to Mongolia. Winters in the 

 valley of the Nile, and eastwards in South Asia as far as Assam. 



GEEAT BLACK-BACKED GULL. Larus marinus. 



Resident, but very local. Circumpolar species, breeding in the Arctic 

 and Subarctic Regions of Europe, Asia, and America. Winters north of the 

 Tropics. 



LESSER BLACK-BACKED GULL. Larus fiiscus. 



Common resident on our rocky coasts. Breeds on the west and south 

 coasts of Europe from Norway to the Black Sea. Migrates from the 

 colder part of its breeding-range to winter on the coast of West Africa. 



HERRING-GULL. Larus argentatus. 



Common resident on our rocky coasts. North Atlantic species, breeding 

 in subarctic America as far west as Great Slave Lake, and in subarctic 

 Europe as far east as Norway. Winters in North America from the 

 States to Guatemala, and in Europe as far south as Spain. 



GLAUCOUS GULL. Larus glaucus. 



Irregular winter visitor. Circumpolar species, breeding on islands in 

 the Arctic Oceau, and in very high latitudes on the coasts of both con- 

 tinents. Winters north of the Tropics. 



ICELAND GULL. Larus leucopterus. 



Irregular winter visitor. Breeds in high latitudes in arctic America 

 from Alaska to Greenland. Seldom wanders far into the temperate 

 regions in winter. 



COMMON GULL. Larus canus. 



Common resident in Scotland, rarer in Ireland, winter visitor to 

 England. Breeds in subarctic Europe and Asia. Winters on the shores 

 of the Mediterranean, Black, and Caspian Seas, and on the coasts of China 

 and Japan. 



