CONTENTS. 



Page 



Preface v 



Introductory Remarks 1 



Supposed Accidental Visitors 3 



Introduced Species 3 



Subspecies 4 



greographical distribution of birds within the bllitish islands. 4 



Residents 6 



Summer Visitors 9 



Winter Visitors 11 



Spring and Autumn Migrants 13 



Accidental Visitors 15 



jeographical Distribution ofBritish Birds during the Breeding- 

 season outside the British Islands 19 



circumpolar and circumtropic species 20 



Nearly Circumpolar Species 23 



North Atlantic Species 23 



Nearctic Species 24 



Pal^arctic Species 25 



West Pal.earctic Species 29 



Species ranging east to 110° 29 



Species ranging east to 85° 30 



Species ranging east to 70° 32 



Species ranging east to 60° ......... 33 



Spec'.es ranging east to 50° 34 



Species confined to Western Europe 35 



East Pal^earctic Species .35 



Central Pal^arctic Species 36 



!!limatic Distribution of British Birds during the Breeding- 

 season 37 



kPPENDIX : Brief Summary of the Geographical Distribution 

 OF each British Bird, &c 41 



