GLACIAL EPOCHS AND POLAR CLIMATES. 57 



INCIPIENT 



f Waxwing 

 I Gray Phalarope 

 J Iceland Gull 

 Ivory Gull 

 Little Auk 

 Steller's Eider 



Mileage erratic ; but 

 normally from 1000 

 miles downwards 



MODERATE 



LONG 



Rufous Warbler 

 Woodchat Shrike 

 Pied Wagtail 

 SHORT -{ Stone Curlew 

 Woodcock 

 Black Tern 

 Golden-eye 



r Rock Thrush 



Great Reed Warbler 



Bee-Eater 



Turtle Dove 

 -j Spoonbill 



Crane 



Lapwing 



Jack Snipe 



Mallard 



Wheatear 



Sedge Warbler 



Blue-headed Wagtail 



Nightjar 



Cuckoo 



Corn Crake 



Greenshank 



From 



1000 — 2000 



miles 



From 



miles 



;ooo — 5000 



From 6000- 

 miles 



■7000 



EXTENDED 



vSwallows 



Turnstone 



Gray Plover 



Whimbrel 



Knot 



Pectoral Sandpiper 



Sanderling 



Curlew Sandpiper 



Asiatic Golden Plover 



Hudsonian God wit 



From 7000 — 10,000 

 miles 



