What is Common eider?
{{Taxobox | name = Common eider | status = LC | status_system = IUCN3.1 | status_ref =<ref>{{IUCN2006|assessors=BirdLife International|year=2004|id=47224|title=Somateria mollissima|downloaded=11 May 2006}} Database entry includes justification for why this species is of least concern</ref> | image = Somateria mollissima male..jpg | image_width = | image_caption = Adult drake | image2 = Common Eider (Somateria mollissima) (W1CDR0001491 BD11).ogg | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[Aves]] | ordo = [[Anseriformes]] | familia = [[Anatidae]] | subfamilia = [[Merginae]] | genus = ''[[Somateria]]'' | binomial = ''Somateria mollissima'' | binomial_authority = ([[Carolus Linnaeus|Linnaeus]], 1758) | range_map = Somateria mollissima dis.png | range_map_width = | range_map_caption = Green: breeding<br />Blue: winter/feeding}} The '''common eider''' (''Somateria mollissima'') is a large [[Merginae|sea-duck]]. They live on the northern coasts of [[Europe]], [[North America]] and eastern [[Siberia]]. It breeds in [[Arctic]] and some northern temperate regions. They [[bird migration|winter]] farther south in [[temperate]] zones. There it can form large flocks on coastal waters. It can fly at speeds up to 113&nbsp;km/h (70&nbsp;mph).<ref>{{cite web|url=https://www.thetravelalmanac.com/lists/birds-speed.htm|title=World's Fastest Birds|website=www.thetravelalmanac.com}}</ref> == Description == The common eider is both the largest of the four eider species and the largest duck found in Europe and in North America. It measures {{convert|50|to|71|cm|in|abbr=on}} in length, weighs {{convert|0.81|to|3.04|kg|lb|abbr=on}} and spans {{convert|80|-|110|cm|in|abbr=on}} across the wings.<ref>[http://www.allaboutbirds.org/guide/Common_Eider/lifehistory] (2011).</ref><ref>Ogilvie & Young, ''Wildfowl of the World''. New Holland Publishers (2004), {{ISBN|978-1-84330-328-2}}</ref> It has a bulky shape and large, wedge-shaped bill. The male is unmistakable, with its black and white plumage and green [[nape]