One of the largest nature reserves managed in the north Chilterns, at Totternhoe nature reserve (31 hectares), the use of conservation grazing results in short turf which is low in nutrients and supports a diversity of specialist chalk grassland flora, including several species of orchid, as well as being a stronghold for the scarce Duke of Burgundy and several other chalk grassland butterflies.
Thanks to generous funding of £35,000 from Grantscape various habitat and infrastructure works have now been completed: in the area known as Totternhoe Knolls, a Site of Special Scientific Interest (SSSI), fencing at Horton's Field means that it can now be used for conservation grazing. This controlled grazing will help the area develop a greater diversity of chalk grassland flora.