Owls in Finland changing colour, scientists say

Scientists in Finland say warmer winters in recent years are causing some of the country's owls to change colour. Research done at the University of Helsinki suggests brown owls are better able to survive the warmer weather than grey-feathered owls.
 http://www.bbc.com/turkce/ingilizce_dersleri/2011/02/110228_le_owl.shtml