Purple Emperor butterfly's 'filthy table manners'

The Purple Emperor is one of Britain's largest and most elusive butterflies, but its beauty belies a violent nature and gruesome habits.

The Purple Emperor feeds on rotting flesh and faeces - which is why aficionados can be found wandering the woods of southern England in July with everything from dirty nappies to decaying shrimps in hand to bait this enigmatic insect.

Butterfly conservationist and Purple Emperor fan Neil Hulme explains the allure of the species.

Video journalist: Emma Ailes

Read more: The butterfly that feeds on rotting flesh