Figure 1

Area relief map of the study site based on a Digital Elevation Model (DEM) with 100 m equidistance lines.
The paired towers are located in the fenced and grazed meadows, respectively, with 600 m distance between two towers.
Area relief map of the study site based on a Digital Elevation Model (DEM) with 100 m equidistance lines.
The paired towers are located in the fenced and grazed meadows, respectively, with 600 m distance between two towers.