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OBSERVATIONS ON 
XXXI. — Some Observations on the Falco chry- 
saetos and F. fulvus of Authors, proving the 
Identity of the two supposed species. 
By P. J. Selby, Esq. 
{Read ^5th January 1823.) 
In Mr Wilson's excellent and scientific observations on 
some species of the genus Falco, contained in the second 
volume of the Society''s Memoirs, he has stated it as his 
belief, that the Golden and Ring-tailed Eagles {Falco 
chry saetos and F. fulvus) of authors, are in reality distinct 
species, and cannot be considered as individuals of the 
same kind, varying only in plumage, from a difference of 
age or sex. In this opinion, I beheve, he still remains sup- 
ported by many ornithologists. 
In consequence of his remarks, and of certain doubts as 
to their correctness, which I was led to entertain from the 
remarkable changes I had seen developed in the Falco 
albicilla, or Cinereous Eagle, during its progress to matu- 
rity, I was induced to pay particular attention to the his- 
tory of these birds, and especially to the changes of plu- 
