Damselflies, Coenagrion ornatum, habitat distribution, Czech Republic.

The distribution of Coenagrion ornatum in the CR is far more extensive than considered up to 2009. Before 2008 only one recent population from the Piletický brook watershed and five historical records from Bohemia and Moravia were known. In 2009 twenty-five new localities with Coenagrion ornatum were discovered. Thirty-five new localities with C. ornatum were discovered in 2010. These localities are distributed in Bohemia as well as in southern Moravia which means further confirmation of this species distribution within the whole area of Moravia and Silesia. Furthermore, three localities with larvae occurrence were discovered in Bohemia. The new C. ornatum localities are situated mostly in open farmland or mining areas at altitudes below 250 m a.s.l. C. ornatum prefers sunny parts of brooks and amelioration ditches with lush littoral vegetation. However, it also occurs along degraded and regulated sections of the streams where the vegetation is dominated by Phalaris arundinacea and Urtica dioica.