Ditchling Common  Ditchling Common is a biological Site of Special Scientific Interest south-west of Wivelsfield in East Sussex. It is a country park. which is owned and managed by East Sussex County Council. The common has several different types of acidic heath grassland, together with areas of bracken, scrub, woodland, streams and a pond. The rich butterfly and moth fauna includes several uncommon species such as the small pearl-bordered fritillary and green hairstreak butterflies.