are 639 species and this number it is estimated to raise to 1800–1900. The Neuropterida are 25 species, or 20% of Bulgaria's total diversity. There are 36 Hymenoptera species, found mainly at lower elevations. The Trichoptera are 59 species, or 24% of Bulgaria's total. The Lepidoptera are 449, including 116 butterflies and 333 moths. Some of the most spectacular butterflies are the mountain Apollo (Parnassius apollo), clouded Apollo (Parnassius mnemosyne), false Eros blue (Polyommatus eroides), mountain Alcon blue (Phengaris rebeli), large blue (Phengaris arion), scarce tortoiseshell (Nymphalis xanthomelas), Titania's fritillary (Boloria titania), eastern large heath (Coenonympha rhodopensis), Cynthia's fritillary (Euphydryas cynthia), etc. Recreation Pirin National Park is a popular tourist destination. The park's main information center is in Bansko and houses an interactive exhibit on the park's forests, allowing visitors to acquaint themselves with facts about the park's vegetation and wildlife. There is also a 30-seat projection room with multimedia equipment. As of 2002 on the territory of the park there were 1837 beds, including 885 in mountain refuges, 214 in hotels, 124 in bungalows and 615 in premises belonging to different departments of the state administration. Some of the refuges include Bezbog, the largest and most modern one; Banderitsa, constructed in 1915 by order of Tsar Ferdinand I of Bulgaria, and Vihren. There are 20 marked hiking trails in the park. Trail No. 1 is part of the E4 European long distance path and crosses the park following the itinerary Predel Refuge–Yavorov Refuge–Vihren Refuge–Tevno Lake–Pirin Refuge–Popov Grasslands. The most challenging hiking trail follows the top of the Koncheto ridge at an elevations of approximately 2,810 m, between the peaks Banski Suhodol (2,884 m) and Kutelo (2,908 m). The north-western side of Koncheto is almost vertical and 300–400 m deep, while the south-western side is less steep (approximately 30 degrees) but reaches 800 m in depth. Development and Environmental Risks There are many factors which threaten the ecosystems in the park. Rock quarries, wildland arson, industrial and illegal logging, poaching, excessive trail use, vehicle access, and most notably the ski resorts have put the park under significant threat. There has been a steady development of skiing infrastructure since the early nineties along the northeast of the range, most notably in the town of Bansko, which has become an international winter resort. In 2003, a large forested portion of the Todorka peak and the nearby ridges were cleared to begin the