an Entity references as follows:
Marsland Valley is a nature reserve situated in two large valleys which straddle the northern end of the Devon-Cornwall border. It is a designated nature reserve jointly managed by the Devon Wildlife Trust and the Cornwall Wildlife Trust. The reserve is a Special Area of Conservation, as well as forming part of two Sites of Special Scientific Interest; Steeple Point to Marsland Mouth on the Cornish side and in Devon. Roe deer and purple hairstreak butterflies can both be seen here, as well as the extremely rare pearl-bordered fritillary and the small pearl-bordered fritillary.