THE GLACIAL RANGE CONTRACTION, ETC. 151 



detailed information is much to be desired, and will 

 materially assist us in our study of the Emigration and 

 Migration of birds within the British Archipelago. 



We will next deal with the species that either visit 

 the British Islands in autumn and pass the winter 

 therein, or migrate across them in spring and autumn 

 to winter quarters further south, and breeding-grounds 

 further north. These species are tabulated below. 



Note. — A few individuals of some of the species (marked *) breed in 

 our area, so that some of them may be said to be resident therein, but for 

 obvious reasons they have not all been included with our typical residents, 

 w signifies Winter Visitor ; r\v Rare Winter ditto ; LW Local Winter 

 ditto ; MW Migration and Winter, chiefly the fomier ; x m Migration 

 chiefly, few Breed ; x w Winter chiefly, few Breed ; cm Coasting Migrant ; 

 RM Rare on Migration ; AM Abnormal Migrant. 



