tremulous notes at sun-set or later are charac- 

 teristic. 



Great Horned Owl 



375. Great Horned Owl — Bubo mrginianus 

 virginianus. 



Very large. Length 22 inches. 



Conspicuous ear-tufts; upperparts mottled buffy 

 and black; face rich buff, white patch on throat; 

 underparts buffy, thickly barred with black. 



50 



