musk duck

  1. an Australian duck (Biziura lobata) with an inflatable leathery pouch beneath the lower jaw, spikelike tail feathers, and a musklike odor during the breeding season
  2. Muscovy duck

See musk duck in American Heritage Dictionary 4

noun
  1. See Muscovy duck.
  2. A waterfowl (Biziura lobata) of Australia, the male of which has a leathery chin lobe and emits a musky odor during the breeding season.
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