Shortheath Common is a 59.5-hectare (147-acre) biological Site of Special Scientific Interest east of Bordon in Hampshire.

[1][2] It is also a Local Nature Reserve[3][4] and a Special Area of Conservation.

[5] The common has areas of bracken, woodland, heath and a pond, but its main ecological interest is a large valley mire.

Much of it is covered by Sphagnum mosses, but there are also many vascular plants, such as velvet bent and the insectivorous round-leaved sundew.

The invertebrates are also of particular interest, including 23 breeding species of dragonfly.