Dietzel Gyula: A Bakony természettudományi kutatásának eredményei 21. - A Bakony nappali lepkéi. (45 színes fotóval) (Zirc, 1997)

Angol nyelvű összefoglaló

tings were reported by Miklós Nyírd and Kálmán Szedke from the Eastern Bakony. In 1986 a worn specimen, presumably a vagrant, was captured by the author at St. George-Field, Bánd in the Southern Bakony. During June 1993 many specimens were seen in parks and private gardens in the Koloska Valley (Balaton Highlands) in close proximity to its hostplant Celtis australis. Protected fauna. Status in Bakony: 1. VII. Family: LYCAENIDAE Strymon w-album (KNOCH, 1782) White-letter Hairstreak (Map 26, Item 86) This species is known to exist in several localities in the Bakony Mountains. It is never common except on the Hárskút Plateau where during some years it occurs in profusion. Its time of appearance varies from mid June to early July depending on the season. Deciduous forest with an abundance of Ulmus is the butterfly's preferred habitat. In recent years coastal populations at Lake Balaton have almost disappeared. The use of pesticides and other agricultural chemicals may have contributed to the species' declining numbers in this area. Protected. Status in the Bakony: 3. Strymon pruni (LINNAEUS, 1758) Black Hairstreak (Map 27,Item 88) Uncommon but present in all the Bakony subregions. This univoltine species flies on warm, calm, sunny days from mid May until early July. Sightings are usually sporadic and often in the vicinity of Prunus trees. The author has observed large numbers congregating around fruit trees in several abandoned farms and gardens in the region. The future of S. pruni is severely threatened by the continual misuse of chemicals and artificial fertilisers. Protected. Status in the Bakony: North subregion: 3; South subregion: 2. Lycaena thersamon (ESPER, 1784) Lesser Fiery Copper (Map 29, Item 90) One of the most endangered Lycaenids in the region. This species is found mainly in the Northern Bakony and beside the East-west breakline. It seems to prefer South facing slopes but can be found flying on both dry steppe terrain and in marshy fields. There appears to be no marked differences in specimens from these two quite different biotopes. The first generation flies from mid May until mid June and the larger more iridescently coloured second generation appears during the second half of July. Numbers fluctuate depending on seasonal weather conditions. Protected. Status in the Bakony: 2. Lycaena dispar (HAWORTH, 1803) Large Copper (Map 29, Item 91 ) Avery local species usually encountered in damp marshy meadows. L. dispar is bivoltine in the Bakony the first brood emerging in late May and flying until the end of June while the second generation appears in early August and flies through into September. Specimens from the first brood are generally smaller in size but occasionally the two generations overlap. Females can turn up in many different situations while males tend to be territorial, occasionally