In the beginning of March, Tomáš Kadlec, Martin Štrobl and our master’s student Václav Jelínek launched an experiment investigating the influence of the proportion of black locust cover in forest stands on moth assemblages. Is the invasive tree black locust always a threat for moths? Or the specific proportion in a forest patch can have a positive effect on the diversity of moths? The answer will be provided by this research, which will run throughout the growing season using light traps. The first fieldworks, focused on early-spring species, was successfully completed (see Agriopis marginaria in the picture; picture by Marek Vojtíšek).