CATALOGUE. 



GOLDEN EAGLE. (IMMATURE). 

 Case 1. 



The specimens in this case (in conjunction 

 with those in 306) show some of the various stages 

 of plumage exhibited by this Eagle during its 

 progress towards maturity. 



It is probable that birds of this species are five 

 or six years old before they assume the full mature 

 plumage. Golden Eagles vary considerably, but 

 they should not, I imagine, be considered perfectly 

 adult till all signs of white have disappeared from 

 the tail, and also till the feathers on the legs have 

 become a warm dark brown or rust colour. 



The two specimens on the right, a male and 

 female, I should judge to be two years old, and the 

 remaining bird, a male, in the last stage before 

 assuming the perfect adult plumage. 



The birds were all trapped in the northern 

 Highlands in the spring of 1878. 



See " Eouffh Notes," Vol. I., Plates 2 and 4. 



WHITE-TAILED EAGLE. 

 Case 2. 



Though banished from numbers of eyries where 

 it was formerly in the habit of breeding, the White- 

 tailed Eagle still holds its own on the western 

 Coast of Scotland. 



