The decline of the nightingale in the UK could be due to changes in its habitat along its migratory route to Africa, a study has shown. Last year Anglian Water and the British Trust for Ornithology (BTO) fitted 10 birds at Grafham Water in Cambridgeshire with tracking devices. via Pocket http://www.bbc.co.uk/news/uk-england-cambridgeshire-23124278#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa