Nesting birds endangered

Two out of five of all nesting birds in Switzerland – that's 40% - are endangered. The Swiss government and conservationists have introduced measures to help the species most at risk, and farmers are being offered cash incentives to make their fields more bird friendly. But will this be enough to save some species from extinction? (Video & photos courtesy of ASPO/Birdlife Switzerland, SORBUS and swissinfo.ch)