Ig INTRODUCTORY 



Rail. But the peat-bogs of Scotland have not yet revealed 

 that wealth of bird-life which has been recovered from the 

 peat-bogs and superficial deposits of England, knd which 

 includes amongst others, the Crow, Snowy Owl, Golden 

 Eagle, Buzzard, Pelican, Wild Swan, Eider Duck, Great 





Fig. 4. Ptarmigan once more common than Grouse in the valleys 

 of Sutherland, f natural size. 



Crested Grebe, Coot, Bittern, Crane and Capercaillie. 

 Yet we know from later prehistoric and early historic evi- 

 dences that many of these certainly occurred at a later date 

 in Scotland also, and had probably already been established. 

 As for the smaller fauna, insects must have been plenti- 



