Editing Common merganser (section)

==Description==
It is {{convert|58|-|72|cm|in|frac=2|abbr=on}} long with a {{convert|78|-|97|cm|in|frac=2|abbr=on}} wingspan and a weight of {{convert|0.9|–|2.1|kg|lboz|abbr=on}}; males are on average slightly larger than females, but with some overlap. Like other [[species]] in the [[genus]] ''[[Mergus]]'', it has a crest of longer head feathers, but these usually lie smoothly rounded behind the head and do not normally form an erect crest. Adult males in breeding plumage are easily distinguished, the body white with a variable salmon-pink tinge, the head black with an iridescent green sheen, the rump and tail grey, and the wings largely white on the inner half, black on the outer half. Females and males in "eclipse" (non-breeding plumage, July to October) are largely grey, with a reddish-brown head, white chin, and white secondary feathers on the wing. Juveniles (both sexes) are similar to adult females but also show a short black-edged white stripe between the eye and bill. The bill and legs are red to brownish-red, brightest on adult males, dullest on juveniles.<ref name=Hoyo/><ref name=Madge/><ref name=Snow/>