The Chilterns Natural Area
The Chilterns Natural Area is formed from an outcrop of chalk that is exposed
on the smooth slopes of the valleys and the scarp slope above the Aylesbury
Vale. Extensive deposits of clay-with-flints and glacial deposits that can give
rise to acidic soils and heathland overlie the chalk strata of the plateau.
The area is tremendously important for wildlife as a large number of ancient
woodlands and chalk downlands are present. These support a huge variety of rarities
including the ghost orchid, monkey orchid, silver-spotted skipper and Duke of
Burgundy butterflies, dormouse and the successfully re-introduced red kite.