1) Bird genus 2) Genus mergus 3) Mergansers 
Mergus is the genus of the typical mergansers, fish-eating ducks in the seaduck subfamily (Merginae). The hooded merganser, often termed Mergus cucullatus, is not of this genus but closely related. The other `aberrant` merganser, the smew (Mergellus albellus), is phylogenetically closer to goldeneyes (Bucephala). Although they are seaducks, most.....
[n] - mergansers
genus Mergus noun mergansers