Grazing cows are helping one of the rarest British butterflies 🦋 The high brown fritillary, with its brilliant orange wings and black markings, was once widespread in Wales and England. But its numbers have gone down 62% since 1970, in part because they need a delicate combination of bracken and common dog violet to survive. Paul Dunn, who’s been spent 30 years working to revive the rare butterfly in bracken of the Alun Valley at Old Castle Down, Vale of Glamorgan, says cows have been brought i