| Site of Special Scientific Interest | |
 Hackhurst Downs | |
| Location | Surrey |
|---|---|
| Grid reference | TQ 117 491[1] |
| Interest | Biological |
| Area | 185.1 hectares (457 acres)[1] |
| Notification | 1986[1] |
| Location map | Magic Map |
Hackhurst and White Downs is a 185.1-hectare (457-acre) biological Site of Special Scientific Interest west of Dorking in Surrey.[1][2] White Downs is a Nature Conservation Review site, Grade 2,[3] and part of it is in the 200-hectare (490-acre) White Downs nature reserve, which is owned by the Wotton Estate and managed by the Surrey Wildlife Trust (SWT).[4] Hackhurst Downs is a 29.9-hectare (74-acre) Local Nature Reserve,[5][6] which part of the 40-hectare (99-acre) Hackhurst Downs nature reserve, which is owned by Surrey County Council and also managed by the SWT.[7]
This steeply sloping land is a shared escarpment with Ranmore Common, amounting to an almost whole section of the North Downs, which has grassland, secondary woodland and scrub. It has a rich invertebrate fauna with forty species of butterfly, including adonis blue, chalkhill blue, brown hairstreak, Duke of Burgundy fritillary, marbled white and silver-spotted skipper.[8]
