422 THE ZOOLOGIST. 



as a direct result of the same ; on the one hand, species 

 recorded erroneously in certain districts, on the other hand, 

 species overlooked. The call notes and songs must always be 

 the guiding factor to the ornithologist, as by them alone is it 

 possible to recognize new species, and judge the movements of 

 those that are well known. To those who are aware of these 

 variations of song, and who are able to recognize them, there can 

 be very little fear of mistakes ; but to those naturalists who 

 either cannot, or who have not taken the trouble to learn the 

 notes of every species with which they have come into contact, 

 the possibility of mistakes from the above cause must be very 

 great. 



The following is a list of all the species that came under my 

 notice during the fortnight I was on the island : — 



Turdus viscivorus, T. musicus, T. iliacus, T. pilaris, T. 

 merula, Saxicola cenanthe, Pratincola rubicola, Erithacus rubecula, 

 Regidus cristatus, R. ignicapillus, Accentor modularis, Parus 

 major, P. candeus, Troglodytes parvulus, Motacilla lugubris, M. 

 melanope, Anthus obscurus, Ligurinus chloris, Passer domesticus, 

 Fringilla coelebs, Acanthis cannabina, Emberiza miliaria, E. 

 citrinella, E. cirlus, Sttirniis vulgaris, Pyrrhocorax graculus, Pica 

 rustica, Corvus monedida, C. corax, C. corone, Alauda arvensis, 

 Alcedo ispida, Accipiter nisus, Falco tinnunculus, Phalacrocorax 

 carbo, P. graculus, Sula bassana, Ardea cinerea, Querquedula 

 crecca, Columba palumbus, Charadrius pluvialis, Vanellus vul- 

 garis, Hamatopus ostralegus, Scolopax rusticula, Larus argentatus, 

 L.fuscus, Rissa tridactyla, Alca torda, Colymbus arcticus, Podi- 

 cipes griseigena. 



