iio List of Yorkshire <m</ 



Lesser Black-backed Gull. Larus fuscus L. 



Herring Gull. Larus argentatus Gmel. 



Common Gull. Larus canus L. 



Glaucous Gull. Larus glaucus Fabr. 



Iceland Gull. Larus leucopterus Faber. 



Ivory Gull. Pagophila eburnea (Phipps). 



Kittiwake. Rissa tridactyla (L.). 



Great Skua. Megalestris catarrhactes (L.). 



Pomatorhine Skua. Stercorarius pomarinus (Temm.). 



Richardson's Skua. Stercorarius crepidatus (Gm.). 



Buffon's Skua. Stercorarius parasiticus (L. ). 



Razorbill. AIca torda L. 



Common Guillemot. Uria troile (L.). 



Bridled Guillemot. Uria lachrymans Val. 



Briinnich's Guillemot. Uria bruennichi Sabine. 



Black Guillemot. Cepphus grylle (L.). 



Little Auk. Alle alle (L.). 



Puffin. Fratercula arctica (L.). 



Storm Petrel. Procellaria pelagica L. 



Fork-tailed Storm Petrel. Oceanodroma leucorrhoa (Vieill.). 



Wilson's Petrel. Oceanites oceanica (Kuhl). 



Fulmar. Fulmarus glacialis (L.). 



Great Shearwater. Puffinus gravis (O'Reilly). 



Naturalist, 



