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THE MIGRATION OF BRITISH BIRDS 



and where such species were preserved from extinction 

 in Western Europe during the glaciation of northern 

 lands, and from which they started as emigrants on 

 their northward extension with the change of cHmate. 



1 It is a very remarkable fact that both these species do not go south of the Equator in 

 Africa, but individuals of the former prolong their migrations in Asia as far south as 

 A.ustralia, and of the latter as far south even as New Zealand ! The Ulack-tailed Godwit 

 and Common Sandpiper are other instances. 



- It is only in winter that this species visits us in a thoroughly wild state. 



There are five other species which might ahnost be 

 inchided in the above table of our winter migrants ; but 

 there can be little doubt that the Goshawk {Astur 

 paliivtbarius), the Black Redstart {Ruticilla titliys), the 

 Firecrest {licguhis ignicapilliis), the Little Bustard {Otis 

 tctrax), and the Red-necked Grebe {^Podiceps ritbricollis) 



