long-eared owl vs western barn owl

long-eared owl

noun
  • Asio otus, a species of owl which breeds in Europe, Asia, and North America. Long eared owls are partially migratory, moving south in winter from the northern parts of their range. 

western barn owl

noun
  • A barn owl of the subspecies Tyto alba alba, endemic to western Eurasia and most of Africa. 

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