The Collaborative International Dictionary of English v.0.48:

Humming \Hum"ming\, n.
   A sound like that made by bees; a low, murmuring sound; a
   hum.
   [1913 Webster]

   Hummingale, lively or strong ale. --Dryden.

   Humming-bird moth (Zool.), a hawk moth. See Hawk moth,
      under Hawk, the bird.
      [1913 Webster] hummingbird

WordNet (r) 3.0 (2006):

hummingbird moth
    n 1: any of various moths with long narrow forewings capable of
         powerful flight and hovering over flowers to feed [syn:
         hawkmoth, hawk moth, sphingid, sphinx moth,
         hummingbird moth]