Mean and standard deviation of habitat variables measured at used and random (control) locations of Francois’s langur in Mayanghe Nature Reserve, China.

The abbreviations of the variables were described in Table 1. SIN and COS are the sine- and cosine-transformations of the aspect, respectively. **P<0.01, *P<0.05, “ns” = not significant. The degree of freedom of t-test varied by different variables because of the adjustment for the equal variance [17].