Whistler

Noun

1. Someone or something that whistles.
2. A bird that whistles (applied regionally to various specific species).
• Spenser Faerie Queene, II.xii:The lether-winged Bat, dayes enimy,
  The ruefull Strich, still waiting on the bere,
  The Whistler shrill, that who so heares, doth dy ....
3. A whistling marmot.
4. A goldeneye.
5. (physics) An audio-frequency electromagnetic wave produced by atmospheric disturbances such as lightning.

Synonyms

• (whistling marmot) hoary marmot