curlew vs moorhen

curlew

noun
  • Any of several migratory wading birds in the genus Numenius of the family Scolopacidae, remarkable for their long, slender, downcurved bills. 

  • A stone curlew. 

moorhen

noun
  • Any of various medium-sized water birds of the genus Gallinula, of the rail family, that feed in open water margins. 

  • A female red grouse, Lagopus lagopus scotica. 

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