xiv MIGRATION 377 



shore or marsh birds, a fact which suggests that they 

 have been carried away involuntarily by storms. I 

 have already (sec p. 357) given reasons for believing 

 that these birds travel over the Atlantic, not over Asia, 

 to our shores. This being so, it is odd that the east of 

 Great Britain claims most of the specimens obtained, 

 the district of the Land's End ranking next, while 

 Ireland has few to show. It has been suggested that 

 they are first carried past the north of our islands to 

 Norway, where observers are few and far between, 

 and return thence with the stream of migrants to 

 England. The subject has been fully discussed by 

 Professor Newton. 1 



Some of the Literature of the Subject. 



(1) Gatke's Die Vogelwarte Helgoland. 



(2) Newton's article on " Migration," Dictionary of Birds, 

 vol. ii., pp. 547-572. 



(3) Wallace's Geographical Distribution of Animals. 



(4) Seebohm's Geographical Distribution of the Charadriidcv. 



(5) Seebohm's Siberia in Europe. 



(6) Palmen's Zugstrassen der Vogel. 



(7) Articles and letters in Nature and the Ibis; also papers 

 referred to in footnotes in the course of this chapter. 



(8) Howard Saunders' Manual of British Birds. 



A NOTE ON GEOGRAPHICAL DISTRIBUTION. 



Though birds are such travellers, yet different parts 

 of the globe have their characteristic Avifauna. Mr. 

 Sclater's division of the world into six ornithological 

 regions has guided Dr. Wallace in his great work on 

 the Geographical Distribution of Animals and Plants. 



I Dictionary of Birds, vol. ii., p. 548. 



