whistler

noun

• 1a person who whistles: he couldn’t tell whether the whistler was moving away from or towards him
• an atmospheric radio disturbance heard as a whistle that falls in pitch, caused by lightning.

• 2a robust Australasian and Indonesian songbird with a strong and typically hooked bill and a loud melodious call. Also called thickhead.

  • Family Pachycephalidae: four genera, in particular Pachycephala, and many species

• 3North American term for hoary marmot.