Een grote populatie van de Beekoeverlibel (Orthetrum coerulescens) in het noordoosten van de Achterhoek

In 2005, a large population of Orthetrum coerulescens was discovered near Eibergen, in the province of Gelderland. On 16 locations, 75 individuals were seen. Mating and deposition of eggs was noticed at several locations. The nearest known populations are at a distance of 25 kilometers. The habitat is described as ditches and artificial brooks which are partly fed by local groundwater. It is argumented that the role of this ground water is of vital importance. It prevents the brooks from desiccation during summer and prevents the water to freeze in winter. The author states that more populations are to be discovered since the type of habitat is poorly visited by odonatologists.