| Site of Special Scientific Interest | |
 | |
  Location within Somerset | |
| Location | Somerset |
|---|---|
| Grid reference | ST558432 |
| Coordinates | 51°11′11″N 2°38′02″W / 51.18631°N 2.63380°W |
| Interest | Biological |
| Area | 21.2 hectares (0.212 km2; 0.082 sq mi) |
| Notification | 1990 |
| Natural England website | |
Twinhills Woods and Meadows (grid reference ST558432) is a 21.2 hectare (52.4 acre) biological Site of Special Scientific Interest on the Monarch's Way south of Dulcote in Somerset, notified in 1990.
Twinhills Woods and Meadows comprise a complex of ancient, semi-natural woodland, neutral and calcareous grassland with associated mature hedges and areas of shrub growth. Further interest is added by the presence of numerous butterfly species on the site. A total of 26 species have been recorded including grizzled skipper (Pyrgus malvae), white-letter hairstreak (Satyrium w-album),[1] green-veined white (Pieris napi),[1] brown argus (Aricia agestis), marbled white (Melangargia galthea), silver-washed fritillary (Argynnis paphia) and marsh fritillary (Eurodryas aurinia).[1]
The site is crossed by the Monarch's Way long-distance footpath.