barn owl vs tawny owl

barn owl

noun
  • An owl of the species Tyto alba, often having a white face and commonly found in barns and other farm buildings. 

tawny owl

noun
  • A species of strigid owl, Strix aluco, of Europe, western Asia, and the Middle East. 

How often have the words barn owl and tawny owl occurred in a corpus of books? (source: Google Ngram Viewer )