STRUCTURE AND SEA-BIRDS OF THE N. ATLANTIC 



15 



Canad- 

 ian 

 Arctic 



Green-, Jan 



LAND MaYEN 



Bear 

 Island 



Spits- Franz t^- 



t [jnovaya 



ber- Josef U 



% Zemlya 



gen Land 



Arctic 

 Euro- 

 pean 

 Russia 



Arctic 

 Nor- 

 way 



Fulmar -r-r4- + + + -r — — 



Shag ..__ — — — — — 4. ^ 



Cormorant extinct + — — — — — + + 



Pomarine 



skua . . + + — — — casual + casual — 



Arctic skua + + + + + + + + + 



Long-tailed 



skua + + once — casual — + + + 



Ivory-gull + + — — + + — — — 



Common 



gull ..— + — ? ___ + 4- 



Herring-guU 



(inch "Ice- + + ? casual — — — + + 



land" gull) 

 Lesser 



blackback — — — — — — 4- + + 



Great 



blackback + + — recent recent — — -f 4- 



Glaucous 



gull ..+ + + + + + + + — 



Ross's gull — once — — — — — — — 



Kittiwake + + + + - + + + + 



Sabine's 



gull . . + + — — + — — once — 



Common 



tern . . — — — — — — — casual casual 



Arctic tern + + recent + + + + + + 



Little auk ? 4- + + + + + — — 



Razorbill — + — ? ___ + + 



Briinnich's 



guillemot +4- + 4- + + + + _ 



Common 



guillemot — 4- — 4- — — 4-4- 4- 



Black 



guillemot 4-4-4-4-4-4-4-4-4- 

 Puffin ..— 4-4-4-4- — 4-4- + 



The breeding sea-birds of the lands and islands north of the Arctic 

 Circle belonging to the Atlantic or the Atlantic section of the Arctic Ocean, 



