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. 2011 Nov 28;6(11):e28212. doi: 10.1371/journal.pone.0028212

Table 2. Description of chosen environmental variables.

Environmental Variable Description
Distance to roads (m) Distance in meters to paved roads
Distance to paths (m) Distance in meters to unpaved tracks or paths
Distance to inhabited places (m) Distance in meters to inhabited places
Bushes (%) Percentage of surface covered with bushes 25 m around the pylon
Trees (%) Percentage of surface covered with trees 25 m around the pylon
Slope (%) Average slope, in%, 25 m around the pylon
Prey abundance Abundance of prey, in 5 categories, 25 m around the pylon
0. No prey saw or signs observed
1. Few signs observed
2. A single prey observed or presence of several signs
3. Several preys and presence of abundant signs observed
4. Many preys and very abundant signs observed