2/2 In Canada's Rocky Mountains, fossils document an explosion in animal diversity. (R)
2/6 A look at how every one of the 20,000 islands was colonised by the Polynesians. (R)
Raymond Mearns meets ornithologist and wildlife expert Roy Dennis. (R)
BBC Radio Scotland
Adam Walton explores the mysteries of birdsong.
BBC Radio Wales
Younger farmers are tempted to livestock auctions with an offer of loaned animals.
BBC Radio 4
Rachael Garside examines the impact of the recent heavy snow on farmers.
BBC Somerset's weekly look at rural news, countryside issues, wildlife and local events.
5/8 A look at the maps of John Cary which show the routes of all of Britain's canals. (R)
BBC Two Scotland
A visit to Ile de Sein, a tiny 'Island of Heroes' off the coast of Brittany. (R)
4/4 Chris Packham travels across the world to reveal the secrets of our watery habitats. (R)
2/3 Looking at the colourful wildlife of east Africa's lakes and rivers. (R)
BBC Two except Scotland
2/6 Coast celebrates the stories of the workers from around our shores. (R)
BBC Two except Scotland, Wales
2/26 Dougie Vipond at the impact the Beeching Report had on the rural rail network in Scotland.
The team journey to Saltburn, a resort founded by the Victorian entrepreneur Henry Pease. (R)
BBC Two Wales
7/8 Steve Backshall journeys from the mountains of Ethiopia to the plains of South Africa.
BBC One except Scotland, Scotland HD
Matt explores Suffolk's boating heritage as he puts the finishing touches to a boat.
Farmers fear price cuts may lie ahead on milk sold for cheesemaking. With Caz Graham.
Monday 15 April 2013