This week, the Climatic Atlas of European Breeding Birds was published by the RSPB and addressed the issue of the impact on bird populations of climactic change.
The answer was startling - the populations will move about 550km North East by the end of the century.
That's 55km per decade - almost 35 miles - that the birds will move their nesting.
Or another way of looking at it is that they will have left Lewis and moved to the mainland by 2020.
So when the RSPB say, "we need urgent action to cut greenhouse gas emissions, and redouble our efforts for nature conservation, if we are to avoid calamitous impacts on birds". That'll include supporting the Lewis Wind Power scheme then?
If the birds are moving North East at such a rate, then what bird populations are going to be left on the island, unless we do something about renewable energy, and quickly?