|Site of Special Scientific Interest|
|Area of Search||Oxfordshire|
|Area||3.1 hectares (7.7 acres)|
|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.