mergus

I blamed the boatmen much for firing, and charged them with having fired at the dog: this, however, appeared not to have been the case, as they fired at a loon, (mergus merganser.)

Travels in the Interior of America, in the Years 1809, 1810, and 1811 1819

The merganser, (_mergus serrator_,) which preys upon small fish, was the first of the duck tribe that appeared; next came the teal,

Narrative of a Journey to the Shores of the Polar Sea, in the years 1819-20-21-22, Volume 2 John Franklin 1816

Latin name of the diver, or didapper, ‘mergus,’ by saying that it was so called, ‘a mergendo,’ from its diving, which doubtless was the origin of the name, though not taking its rise in the fiction here related by the Poet.]

The Metamorphoses of Ovid Literally Translated into English Prose, with Copious Notes and Explanations 43 BC-18? Ovid 1847