Chalk grassland is an intenationally important habitat and is identified as a priority in the UK Biodiversity Action Plan. Only 1% of the Surrey Hills has remnant chalk grassland cover. These chalk grasslands support a diversity of flora and fauna, including wild flowers, herbs and mosses, together with a myriad of associated insects, particularly butterflies. At White Downs and Box Hill there are wonderful examples of chalk grassland managed by the National Trust.