BBC: Three species of migratory duck have shifted their wintering grounds northward in response to increasing temperatures, say scientists.
The birds - the tufted duck, goosander and goldeneye - are common in Britain and Ireland during northern Europe's winter.
But their numbers in these countries have shrunk in the last 30 years.
According to the findings, published in the journal Global Change Biology, many now stop short on their annual journey.
Gathering and analysing data from the three-decade-long...