| Site of Special Scientific Interest | |
 | |
 Location of Warren Bank. | |
| Area of search | Oxfordshire |
|---|---|
| Grid reference | SU 653 857 |
| Interest | Biological |
| Area | 3.1 hectares (7.7 acres) |
| Notification date | 1986 |
| Location map | Magic Map |
Warren Bank is a 3.1-hectare (7.7-acre) biological Site of Special Scientific Interest south-east of Wallingford in Oxfordshire. It is managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.
This steeply sloping site has unimproved chalk grassland and scrub. There is a rich variety of flora, including horseshoe vetch, chalk milkwort and bee orchid. There are also many insects, with butterflies such as dark green fritillary and green hairstreak.