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Table 1 Mean ± SE of habitat variables for Dicrurus hottentottus at nesting and random locations in Dongzhai National Nature Reserve, Henan, China in 2011

From: Evaluation of nest site preferences of a nest dismantler, the Hair-crested Drongo (Dicrurus hottentottus) in Dongzhai National Nature Reserve of central China

Variable Nest site Random site t P
Tree height (m) 18.9 ± 1.03 9.91 ± 0.84 7.73 0.000
Live crown ratio 60.58 ± 2.57 43.71 ± 2.95 3.85 0.000
Diameter at breast height (cm) 33.45 ± 2.01 16.36 ± 1.85 6.49 0.000
Tree rank 2.73 ± 0.07 1.96 ± 0.10 6.30 0.000
Canopy cover (%) 79.89 ± 2.11 79.16 ± 3.03 0.23 0.819
Slope (°) 15.24 ± 1.68 27.50 ± 2.01 −4.56 0.000
Aspect N 0.04 ± 0.10 −0.05 ± 0.10 0.63 0.535
Aspect E -0.15 ± 0.10 −0.03 ± 0.11 −0.79 0.432
Azimuth N -0.02 ± 0.10 0.02 ± 0.10 −0.33 0.742
Azimuth E 0.05 ± 0.10 −0.04 ± 0.10 0.63 0.535
Herbaceous (%) 39.23 ± 2.38 32.89 ± 3.04 1.75 0.086
Wood (%) 13.73 ± 1.82 14.04 ± 1.84 −0.13 0.900
Bare ground (%) 6.53 ± 1.44 6.32 ± 1.70 0.08 0.935
Litter (%) 31.78 + 2.01 40.03 ± 2.88 −2.69 0.010
Rock (%) 4.1 ± 1.02 4.69 ± 1.15 −0.44 0.662
Coarse woody debris (%) 1.96 ± 0.46 2.32 ± 0.48 −0.54 0.593
Water (%) 1.64 ± 0.92 0.02 ± 0.02 1.76 0.085
Litter depth (cm) 2.64 ± 0.19 3.22 ± 0.22 −2.35 0.023
Ground cover 0.96 ± 0.01 0.96 ± 0.02 −0.20 0.844
Understory 0.35 ± 0.04 0.48 ± 0.05 −2.58 0.013
Midstory 0.4 ± 0.04 0.65 ± 0.04 −4.21 0.000
Overstory 0.7 ± 0.04 0.46 ± 0.05 4.53 0.000
Basal area (m2/ha) 11.16 ± 1.13 8.90 ± 0.87 1.55 0.129
Trees per hectare 29.92 ± 4.24 79.63 ± 10.30 −4.60 0.000