northern lapwing vs sea crow

northern lapwing

noun

  • A crested plover, Vanellus vanellus. 

sea crow

noun

  • The blackheaded pewit, and other gulls. 

  • The Western jackdaw. 

  • The chough. 

  • The skua. 

  • The cormorant. 

  • The razorbill. 

  • The coot. 

How often have the words northern lapwing and sea crow occurred in a corpus of books? (source: Google Ngram Viewer )