hummingbird moth vs sphingid

hummingbird moth

noun

  • Any of the genus Hemaris of sphinx moths. 

sphingid

noun

  • Any of many hawk moths of the family Sphingidae 

adj

  • Of or pertaining to these moths. 

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