Editing Adélie penguin (section)

===Migration===
[[File:Automated weighbridge for Adélie penguins - journal.pone.0085291.g002.png|thumb|Adélie penguins are identified and weighed each time they cross the automated weighbridge on their way to or from the sea.<ref name="Lescroël2014">{{Cite journal | last1 = Lescroël | first1 = A. L. | last2 = Ballard | first2 = G. | last3 = Grémillet | first3 = D. | last4 = Authier | first4 = M. | last5 = Ainley | first5 = D. G. | editor1-last = Descamps | editor1-first = Sébastien | title = Antarctic Climate Change: Extreme Events Disrupt Plastic Phenotypic Response in Adélie Penguins | doi = 10.1371/journal.pone.0085291 | journal = PLOS ONE | volume = 9 | issue = 1 | pages = e85291 | year = 2014 | pmid =   24489657| pmc =  3906005| bibcode = 2014PLoSO...985291L | doi-access = free }}</ref>]]
[[File:File-Ice cased Adelie penguins after a blizzard at Cape Denison.jpg|thumb|Adelie penguins after a blizzard at Cape Denison, 1912]]
Adélie penguins living in the [[Ross Sea]] region in Antarctica migrate an average of about {{convert|13000|km|mi}} each year as they follow the sun from their breeding colonies to winter foraging grounds and back again. During the winter, the sun does not rise south of the [[Antarctic Circle]], but sea ice grows during the winter months and increases for hundreds of miles from the shoreline, and into more northern latitudes, all around Antarctica. As long as the penguins live at the edge of the [[fast ice]], they will see sunlight. As the ice recedes in the spring, the penguins remain on the edge of it, until once again, they are on the shoreline during a sunnier season. The longest treks have been recorded at {{convert|17600|km|mi}}.<ref>{{cite news | url=http://antarcticsun.usap.gov/science/contenthandler.cfm?id=2230 | work=The Antarctic Sun | title=Researchers follow Adélie penguin winter migration for the first time | first=Peter | last=Rejcek | date=13 August 2010 | access-date=3 September 2010 | archive-date=15 October 2011 | archive-url=https://web.archive.org/web/20111015082151/http://antarcticsun.usap.gov/science/contenthandler.cfm?id=2230 | url-status=live }}</ref>