Angle of den entrance
Based on our on-site measurements, we found that the angle of the den entrance on shady slopes was 32.87 ± 3.98°, which was significantly lower than that on sunny slopes (38.67 ± 4.23°) and in flat areas (38.13 ± 3.92°) (F2, 128 = 1.39, P < 0.05). However, the angle of the den entrance was not significantly different between those on sunny slopes and in flat areas (F1, 129 = 2.37,P = 0.083) (Fig. 7).