goosander

Blend of goose +‎ gander. The oldest known use is by Drayton (1622).

goosander (plural goosanders)

1. A merganser, Mergus merganser, of the northern hemisphere. They eat fish and are common on lakes and rivers.
   • 1622, Michael Drayton, Poly-Olbion, song 25 p. 106:

     As they above the rest were Lords of Earth and Ayre.
     The Gossander with them, my goodly Fennes doe show
     His head as Ebon blacke, the rest as white as Snow,

• (North American) common merganser, Mergus merganser