5 2o MIGRATION OF BRITISH BIRDS; 



there to perform the functions of in- 

 cubation and nutrition in full fecu- 

 rity. They and their young quit their 

 retreat in September, and difperfe 

 themfelves over Europe. With us 

 they make their appearance the be- 

 ginning of October; circulate firfl 

 round our mores, and when compel- 

 led by fevere froft, betake them- 

 felves to our lakes and rivers. Of 

 the web-footed fowl there are fome 

 of hardier conftitutions than others ; 

 thefe endure the ordinary winters of 

 the more northern countries, but 

 when the cold reigns there with more 

 than common rigor, repair forihelter 

 to thefe kingdoms : this regulates 

 the appearance of fome of the Diver 

 kind, as alio of the wild Swans, the 

 Swallow tailed Shield Duck, and the 

 different forts of Goofanders which 

 then vifit our coafts. 

 Cormorants* The Cormorant and Shag breed on 



moil of our high rocks : the Gannet 

 in fome of the Scotch ifles, and on the 



far north to breed, as appears fiom the biflories of Greenland and 

 Spitsbergen, by hgede and Cranio- Thefe birds feem to make 

 Iceland a refting place, for, as HorreSoiv obfcrves, few continue there 

 to breed, but only vifit that ifland in the Spring, and after a fhort 

 flay, retire ftill farther north. Coll. <voy. Dutch India company, ovo. 

 1703. p. 19. 



The Sii-a/lo-ir tailed Shield Duel breeds in the ley Sea, and is forced 

 fouthward only in very hard winters. Aman. Acad. iv. 585. 



coaft 



