Melanargia galathea, a butterfly endemic to Europe, parts of Russia and Southwestern Asia, and Japan
The Marbled White was called "Our Half-mourner" by James Petiver, (1717), "The Marmoris" by Benjamin Wilkes and "The Marmoress" by Moses Harris.
The downs are home to a wide variety of wildlife including many rare wild flowers, such as the Bee Orchid, and different butterfly species, like the Marbled White and the Chalkhill Blue.
They include the Silver-washed Fritillary (Argynnis paphia), of which the valenzia form has been found, Purple Hairstreak (Quercusia quercus) and Marbled White (Melanargia golathea).
These sheltered glades provide favourable climatic conditions for butterflies including Marbled White (Melanargia galathea) and Silver-washed Fritillary (Argynnis paphia).
Pearl-bordered Fritillary, Duke of Burgundy Fritillary, Marbled White, Dingy Skipper and Grayling are just some of species that inhabit the national park.