It is named for its similarity to the purple emperor butterfly. Other fauna include roe deer, herons and purple emperor butterflies. Headline species include nightingales, white storks, turtle doves and purple emperor butterflies. It is the habitat of the curiosity Freyer's purple emperor (). There are several uncommon butterfiles such as the black hairstreak and purple emperor. The national animals are the Green pheasant, Koi fish and the Great purple emperor butterfly. It is now a breeding hotspot for purple emperor butterflies, turtle doves and nightingales. Among the species found here is the Purple Emperor butterfly. Apatura iris, the purple emperor, is a Palearctic butterfly of the family Nymphalidae. Freyer's purple emperor has dark wings with reddish and yellow bands. Apatura metis, the Freyer's purple emperor, is a species of butterfly found in Eurasia. Mimathyma ambica, the Indian purple emperor, is a species of nymphalid butterfly found in Asia. Freyer's purple emperor belongs to the genus "Apatura", subfamily Apaturinae. Like the purple emperor this butterfly uses 'master trees', usually European ash ("Fraxinus excelsior").