1. Large crested fish-eating diving duck having a slender hooked bill with serrated edges
   - merganser, fish duck, sawbill 
2. Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill

Derived forms: sheldrakes

Type of: duck, sea duck

Part of: genus Mergus, genus Tadorna, Mergus, Tadorna

Encyclopedia: Sheldrake

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