Matthew Oates has long been obsessed with the elusive and beautiful purple emperor, a butterfly of the high tops which is aggressive to other butterflies and yet often lands on people. But in this programme he's out-obsessed by Neil Hume, a self-confessed addict of the emperor .Together they watch the butterflies chasing off rivals high in the tree-tops and discuss its anti-social feeding habits which include sipping human sweat and animal dung - this is a butterfly which avoids flowers. As they enthuse over emperors, Neil explains what the experience of seeing this butterfly means and how it takes him to special places at the height of summer.

Presenter: Matthew Oates
Producer: Brett Westwood
Editor: Julian Hector. Show less