I always try to keep an eye of the arthropod fauna in cities - sometimes I find the most peculiar species in parks or gardens. This summer I focused on a small park located between two buildings of the University of Debrecen. This park is only 150 by 120 metres big (less than 2.5 acres) and planted with old Pedunculate Oaks. These old trees provide a valuable habitat for many kinds of insects. Almost all species shown here were found there.