TO ORKNEY AND SHETLAND. 105 



may escape the Divers, and should the former 

 change their ground, the Gulls invariably accom- 

 pany them. The young of this bird is generally 

 known by the name of the Black-billed Auk. I 

 was formerly inclined to think with Montagu that 

 they were a distinct species, in which opinion I 

 was strengthened by the circumstance of the Ra- 

 zor-bill being numerous in the summer months 

 and leaving on the approach of winter, while, on 

 the contrary, the Black-billed Auk, or young, is 

 scarce in summer, but more abundant in winter ; 

 subsequent experience has however convinced me 

 of my error. 



Fratercula arctica, Steph. Tamie Norie*. 

 Puffin. Coulterneb. — This bird breeds plentifully 

 in Orkney and Shetland, and constructs its nest 

 on the upper part of high rocks, under large 

 stones, and in holes in the ground. It is a mi- 

 gratory species, appearing in May and leaving 

 again in August; it is a shy feeder, is never seen 

 near frequented places, but always resorts to deep 

 water in the neighbourhood of high rocks. 



Ph alacrocorax Carbo, Steph., Flem. Bron- 

 gie*. Scarf Cormorant. — This species is a con- 

 stant resident amongst these islands, but is not 

 F 5 



