O. G. Dely szerk.: Vertebrata Hungarica 8/1-2. (Budapest, 1966)
Topál, Gy.: Some observations on the nocturnal activity of bats in Hungary 139-166. o.
After their exit, the animals departed toward the west. It was also very interesting that they returned in the morning mainly from the southeast. I was as yet unable to account for the causes of their insistence on this route and direction. Baradla Cave (2O°30» E, 48°28' N; 332 m a.s.l.). The largest cave in Hungary,situated on the Torna Karst. Several entrances are known, of which the two oldest ones open near the village Aggtelek. The ancient though recently filled and now again opened entrance of the so-called Bat-Branch lies on the shrubby mountain slope, facing SW. In the last decade, it was closed by a door of Iron bars, and put out of use. Some ten meters below and to the east, at the bottom of a monumental and sheer drop of cliff wall, a solid wooden door - with an opening above it for the passing of the bats closes the so-called main entrance of Aggtelek, from where steps lead down into the cave consisting of a chain of enormous chambers. I have made my observations at these entrances, surrounded partly by the barren karst, partly by a sparse growth of trees and shrubs, or woods and agricultural fields. In the nearer vicinity, the only bodies of water are the small Aggtelek and Vörös ponds.In a considerable section of the main Aggtelek Branch, there Is eletrical lighting, but the halls, showing traces of the extensive excavations of guano masses, of the Bat-Branch are desolate. Both in the Bat-Branch and the Aggtelek section, one can frequently see fluttering bats even in summer daytime. The majority of the summer population of the cave is probably Rhlnolophus euryal e . However, this species is hardly visible here in the winter, and it is rather the species Rh. hipposidero s, Rh. ferrumequinu m, Myotls oxygnathu 3, M.myotl s, and M. emarglnatu s which hibernate in greater or smaller numbers in the several cave sections. Héviz (17°12'E, 46°47'N; 117 m a.s.l.). The bat colony, kept under observation, lodged in the shingled loft of the
