Are there ducks that do not quack?

While most ducks do quack, there are a few species of ducks that do not. These include:

- The Muscovy duck, instead of quacking, has a deep, throaty call.

- The Australian wood duck, also known as the maned duck, has a soft, flute-like call.

- The African pygmy goose has a high-pitched, twittering call.

- The ruddy duck has a soft, whistling call.

- The stiff-tailed duck has a high-pitched, squeaking call.