Occurrence: Leviellus thorelli occurs only in southern Moravia on old solitary trees and human constructions. It can form colonies. Description: It has round abdomen, the purple marking (folium) is light edged. An adult female can grow to about 13,5 mm. Period of occurrence: Adult females are seen all the year, the males at the end of summer. Web: It builds bigger, dense and strong webs. It usually responds to a prey soon. The signal thread is connected with nest which is lined with dense fiber. The nest is above the central area. In area of web, where the signal thread is, there is a missing sector. There is the web cut to the circular sector. We can’t see these spiders sitting on their webs during the day. Food: Leviellus thorelli hunts flying insects which sit on tree trunks.