| Site of Special Scientific Interest | |
 | |
 Location of Upper Arun. | |
| Area of search | West Sussex |
|---|---|
| Grid reference | TQ 044 220 |
| Interest | Biological |
| Area | 17.6 hectares (43 acres) |
| Notification date | 1988 |
| Location map | Magic Map |
Upper Arun is a 17.6-hectare (43-acre) biological Site of Special Scientific Interest between Billingshurst and Pulborough in West Sussex.
This 13-kilometre (8-mile) long stretch of the River Arun provides the habitat for a rich riverine flora, such as common club-rush and reed canary-grass. It is an outstanding site for breeding dragonflies, including the clubtail, hairy, brilliant emerald and the nationally rare scarce chaser.
