Richard Grimmett, Head of Conservation at BirdLife International, talks about the worrying decline of the Willow Warbler for the British Trust for Ornithology's A2B migrant arrival calendar: [ Ссылка ]
To help find out why summer migrants such as the Willow Warbler are declining the BTO are funding research projects in Africa. Go to our website to find out how you can help [ Ссылка ]...
