BARN-OWL. 151 
Of the climatic variations of the Barn-Owl less is known than of those 
of the other Owls. The varieties of the Barn-Owl which occur on the 
American continent have been ably classified by Ridgway ; but, although 
Sharpe has collected an array of facts on the subject, occupying no fewer 
than fifty pages of Rowley’s ‘Ornithological Miscellany, no one has yet 
attempted in any way to classify the varieties of this bird which occur in 
the Old World. 
Of the three forms found in the British Islands, the rufous southern form 
is the commonest, and is well figured in Gould’s ‘ Birds of Great Britain’ 
(i. pl. xxxviil.). The pale eastern form and the dark western form are 
both figured in Dresser’s ‘ Birds of Europe’ (v. pl. 302); but a better 
figure of the latter may be found in Rowley’s ‘ Ornithological Miscellany’ 
(i. pl. x.). 
