Dry weather boosts UK's most endangered butterfly

High brown fritillary population rises due to harsh winter and sunny spring

The combination of a harsh winter and sunny May and June has given the population of the UK's most endangered butterfly, the high brown fritillary, a welcome boost.

Volunteers have been counting rare butterflies in a wooded valley on the Devon coast, which has been the focus of a project to encourage species such as the high brown fritillary.