In the third of six films reflecting the relationship between man and wildlife in the West Country, Andrew Cooper explores the natural history of a railway track.
The building of the railways brought great change to the British landscape, and left in its wake a remarkable nature reserve. Today, in the picturesque Dart Valley in Devon, a legacy of the age of steam is preserved, along with the animals and plants - from a beetle that signals with light, to a vixen and cubs underground - a natural history of the everyday and extraordinary wildlife that lives alongside the railway track.
(Ceefax subtitles)