The area of Učka and Ćićarija is also important for its great variety of butterflies and moths. Data in the literature and more recent studies reveal as many as 252 species of butterflies and moths registered in the area (89 butterflies, 163 moths). The most interesting of these are protected by Croatian laws, such as the Croatian hummingbird moth (Hemaris croatica), Cleopatra butterfly (Gonepteryx cleopatra), mountain alcon blue (Phengaris alcon ‘rebeli’), arran brown (Erebia ligea), and clouded apollo (Parnassius mnemosyne), a species endangered throughout Europe.
Of particular interest also is a butterfly species that inhabits moist meadows – the large chequered skipper (Heteropterus morpheus). Such habitats are becoming very rare in Croatia, threatening the survival of this species.