A project by Butterfly Conservation and National Trust on Exmoor aims to create habitat for the high brown fritillary which has seen numbers plummet.

Hairy Hungarian hogs have been drafted in to create the perfect habitat for the UK’s most endangered butterfly, conservationists said.

The curly-haired Mangalitsa pigs and English Longhorn cattle are being deployed as “living lawnmowers” at a National Trust site on Exmoor, Devon, to help create the ideal breeding conditions for the high brown fritillary.