THE MIGRATION OF BRITISH BIRDS 



Note. — One x signifies Winter Visitant ; two x x 's Breeding ; m 

 signifies Passing on Migration ; M x signifies Passing on Migration and 

 Winter Visitant ; AM signifies Abnormal Migrant. 



X X 



AM 



X X 

 AM 



AM 

 X X 



1 The Ravens that breed in South Greenland are colonists from the Nearctic region, 

 and perhaps subspecifically distinct— another indication of the route by which this area 

 has been invaded by birds. 



- Probably Haliatus Icucocefhaliis in South Greenland 



