Table 1. Conditional logistic regression investigating burrow-site selection by eastern chipmunks, based on environmental variables within a 10 m radius plot around paired burrows and control points.

Effect	Estimate	SE	|z|	P
Canopy cover (%)	0.057	0.045	1.28	0.20
Herbaceous plants and shrubs (<1 m) cover (%)	0.010	0.021	0.48	0.63
Rocks cover (%)	−0.086	0.058	1.49	0.14
Woody debris cover (%)	−0.068	0.057	1.20	0.23
Number of logs (>2 m)	0.258	0.137	1.89	0.059
Number of refuges	0.062	0.083	0.74	0.46
Slope (°)	0.256	0.073	3.51	<0.001
Horizontal openness	0.396	0.350	1.13	0.26
Canopy height 1	4.771	4.891	0.98	0.33
Canopy height 2	4.171	4.961	0.84	0.40
Canopy height 3	3.080	4.676	0.66	0.51
Canopy height 4	3.296	4.915	0.67	0.50
Small hardwood tree density	−0.019	0.013	1.50	0.13
Average DBH of large seed-producing trees	0.166	0.117	1.42	0.16
Large beech tree density	−0.104	0.109	0.95	0.34
Large sugar maple tree density	−0.101	0.091	1.11	0.27
Large red maple tree density	0.119	0.257	0.46	0.64
Yellow trout lily cover (%)	−0.047	0.049	0.95	0.34
Carolina spring beauty cover (%)	−0.296	0.201	1.47	0.14

Notes:

The table presents all variables included in the full model, with their beta-coefficient, SE, z and P values. Canopy height 0 = low (reference level). Canopy height 1 = Mix of low and medium. Canopy height 2 = Medium. Canopy height 3 = Mix of medium and high. Canopy height 4 = High. Small trees have a diameter at breast height (DBH) ≤10 cm, while large trees have a DBH >31 cm. Seed-producing trees include American beech (Fagus grandifolia), red maple (Acer rubrum) and sugar maple (A. saccharum).

Analysis included 102 plots that were identified as a burrow-site at least once since 2012 and 102 control plots. Significant variables (α = 0.05) are in bold.