Hilltopping, station taking, territoriality, and possibly lek formation are combined to form the mate-locating strategy of Eupeodes volucris.
Waldbauer, G. P.
"Hilltopping by Males of Eupeodes Volucris (Diptera: Syrphidae),"
The Great Lakes Entomologist, vol 23
Available at: https://scholar.valpo.edu/tgle/vol23/iss3/11