whistler

noun9

1. •
   Someone or something that whistles, or who plays a whistle as a musical instrument.
2. •
   Any bird that whistles or is noted for its whistling vocalisations (applied regionally to various specific species).

   • The lether-winged Bat, dayes enimy, / The ruefull Strich, still waiting on the bere, / The Whistler shrill, that who so heares, doth dy […] — 1590
3. •
   An audio-frequency electromagnetic wave produced by atmospheric disturbances such as lightning.
4. •
   Any of several passerine birds of the genera Pachycephala and Coracornis, of Australasia and the western Pacific.
5. •
   A goldeneye (any of certain ducks of genus Bucephala).
6. •
   A whistling marmot (Marmota caligata).
7. •
   A mountain beaver (Aplodontia rufa).
8. •
   A broken-winded horse.
9. •
   (slang, no longer used) The keeper of a whistling shop, or shebeen.