Buff Wood is a 15.8-hectare (39-acre) biological Site of Special Scientific Interest in Hatley in Cambridgeshire.

[1][2] It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.

[3] This site is ecologically diverse boulder clay woodland, with a range of wildflowers, including oxlips and the uncommon green hellebore.

There are butterflies such as brimstones, large whites, orange-tips and speckled woods.

[3] A permit from the Wildlife Trust is required for access.