It is a remarkable story of how the survival of one species in the animal kingdom can be utterly dependent on another and apparently unrelated creature - no matter how great the disparity in size ...

Cissbury Ring, Findon, West Sussex: The Adonis blue butterflies have a remarkable symbiotic relationship with the ants in the horseshoe vetch Unpromising grey cloud assembles as I climb Cissbury Ring.

Tall and lean-limbed, Crispin Holloway lopes over a hillside of sheep-cropped Downland sward above Lewes, and begins scanning the terrain with the sharp eye of a hawk. But his motives are entirely ...

One of Britain's rarest butterflies has returned to a spot where it has not been seen for more than 40 years. The Adonis Blue, classified as a priority species, is usually only found at a few places ...

As part of the BBC Saving Planet Earth series, Cheryl Baker visits Sussex to find out more about the endangered Adonis Blue Butterfly Presenter Cheryl Baker visit Sussex to find out more about the ...