blue-winged kookaburra vs kookaburra

blue-winged kookaburra

noun
  • A species of kookaburra, Dacelo leachii, of northern Australia and New Guinea. 

kookaburra

noun
  • Any of several species of kingfishers in the genus Dacelo. 

How often have the words blue-winged kookaburra and kookaburra occurred in a corpus of books? (source: Google Ngram Viewer )