Table 1.

Details of lateral position and statistical analyses

Tunnel width (cm)	Condition			Lateral position (cm) median (interquartile range)	Wilcoxon statistics (a vs. b)	Kruskal–Wallis statistics (a vs. c)
	Floor		Walls
60	a	White	Dead leaves	−1.3 (−3.6 to 1.4)	Z = −8.1 p < 0.001	${\mathit{\chi }}_{1/203}^2$ = 18.5 p < 0.001
	b	White	Grey/dead leaves	3.6 (0.4 to 7.0)
	c	Dead leaves	Dead leaves	1.4 (−0.6 to 3.0)
120	a	White	Dead leaves	−1.4 (−6.4 to 5.9)	Z = −7.1 p < 0.001	${\mathit{\chi }}_{1/223}^2$ = 34.6 p < 0.001
	b	White	Grey/dead leaves	8.5 (1.7 to 15.2)
	c	Dead leaves	Dead leaves	−1.3 (−5.9 to 2.8)
180	a	White	Dead leaves	1.2 (−12.1 to 23.1)	Z = −0.6 p = 0.56	${\mathit{\chi }}_{1/207}^2$ = 25.5 p < 0.001
	b	White	Grey/dead leaves	5.7 (−9.5 to 22.9)
	c	Dead leaves	Dead leaves	0.7 (−8.9 to 7.9)
240	a	White	Dead leaves	6.1 (−29.8 to 28.6)	Z = −0.02 p = 0.98	${\mathit{\chi }}_{1/241}^2$ = 9.04 p < 0.01
	b	White	Grey/dead leaves	1.3 (−25.6 to 27.5)
	c	Dead leaves	Dead leaves	8.4 (−9.8 to 24.0)

Data from the conditions with a patterned floor (c) are re-analysed from Linander et al. (2016)