This app will stop working on 3rd April 2017. But you can still listen to BBC iPlayer Radio via your browser by visiting bbc.co.uk/radio
James Aldred encounters one of the world's most powerful birds of prey, the harpy eagle.
BBC Radio 4 Extra
Martin Wainwright looks at our national night time obsession - with the beauty of moths.
5/5 How do we protect our native wildlife from invisible invaders like the ash dieback fungus.
4/5 How invasive is the ring-necked parakeet?
3/5 Derek Mooney finds out how the harlequin ladybird became the UK's fastest invader ever.
2/5 Does Japanese knotweed deserve its place as the most hated plant in the UK?
1/5 The natural history story of the UK's most famous invader - the grey squirrel.
5/5 An entertaining and informative guide to the wildlife of mudflats and salt marshes.
2/5 A guide to some of the wildlife most likely to be found on sandy beaches.
1/5 The first in a series of engaging guides to help identify some common coastal wildlife.