The headland is the habitat of several endangered species of butterflies and moths, including the silky wave, the silver-studded blue (Plebejus argus subsp. caernesis) and the grayling (Hipparchia semele thyone) These last two have adapted to the Great Orme by appearing earlier in the year to take advantage of the limestone flowers and grasses. Also they are smaller than in other parts of the country and are recognised as a definite subspecies. The Great Orme is reported as the northernmost known habitat within Britain for several 'southern' species of spider notably: Segestria bavarica, Episinus truncatus, Micrargus laudatus, Drassyllus praeficus, Liocranum rupicola and Ozyptila scabricula.