Very rare. No apparent trends. Threatened. Two records: 1 male and 9 females together in 1998 along Quercus-Carpinus forest, one female in 2007 on wall of house in agricultural area.
Bron
Auteur(s)
Renema, W.
Publicatie
- Reemer, M., Renema, W., Steenis, W. van, Zeegers, Th., Barendregt, A., Smit, J.T., Veen, M.P. van, Steenis, J. van & Leij, L.J.J.M. van der 2009. De Nederlandse zweefvliegen (Diptera: Syrphidae). Nederlandse Fauna 8: 1-442. Nationaal Natuurhistorisch Museum Naturalis, KNNV Uitgeverij, European Invertebrate Survey - Nederland.