A small, high-pitched metal whistle with six holes that is blown using a fipple.
Someone or something that whistles, or who plays a whistle as a musical instrument.
The mountain beaver (Aplodontia rufa).
The goldeneye (certain ducks of genus Bucephala).
The whistling marmot (Marmota caligata).
An audio-frequency electromagnetic wave produced by atmospheric disturbances such as lightning.
A broken-winded horse.
Any of several passerine birds of the genera Pachycephala and Coracornis, of Australasia and the western Pacific.
Any bird that whistles or is noted for its whistling vocalisations (applied regionally to various specific species).