Figure legends
Figure 1. Study site in Biała Nida river including selected vegetation patches. Six patches of floating vegetation (Potamogeton natans ) manipulated to equal size, used as territories by males and oviposition substrate by females (A). Sequential experimental patch area reduction using a ballast (B).
Figure 2. Experiment in the field. A – C. splendens female glued to a fishing line; B – Flying C. splendens male glued to a fishing line.