170 STUDIES IN BIRD-MIGRATION 



in England. Other northern species were also driven 

 south by the extraordinary severity of the season ; 

 among them Briinnich's Guillemot, a resident in the 

 arctic seas which had once previously — and then a 

 single example only — been recorded as having visited 

 our shores. Several specimens of this interesting visitor 

 were obtained as far south as the Yorkshire coast, and 

 one was captured inland in Cambridgeshire. Waxwings, 

 Smews, Little and Glaucous Gulls, Red-necked Grebes, 

 and Great Northern Divers were also exceptionally 

 abundant. 



Among the rarer species which make, or have made, 

 their appearance chiefly in winter, are White's Thrush, 

 Tengmalm's Owl, the Snowy Owl, Hawk-Owl, Green- 

 land Falcon, Iceland Falcon, Red-breasted Goose, Snow- 

 Goose, Buffel-headed Duck, Harlequin Duck, Hooded 

 Merganser, and Ivory Gull. 



