Whistler

Part of speech: noun (n.)

1. One who, or that which, whistles, or produces or a whistling sound.

2. The ring ousel.

3. The widgeon. [Prov. Eng.]

4. The golden-eye.

5. The golden plover and the gray plover.

6. The hoary, or northern, marmot (Arctomys pruinosus).

7. The whistlefish.