Table S1.

Orientation of zebra finches trained to relocate a food reward in the spatial orientation assay using magnetic compass cues under unpolarized light

	Birds tested for magnetic compass orientation (Fig. 1C)			Birds tested in a vertical magnetic field (Fig. 1D)	Birds tested for magnetic compass orientation in a RF field (Fig. 1E)
	gN	mN	Trained MC direction	gN	gN	mN	Trained MC direction
n	20	20	20	20	21	21	21
Mean direction	258°	356°/176°	356°/176°	328°	75°	265°	309°
Mean vector length	0.155	0.506	0.506	0.496	0.270	0.321	0.311
Rayleigh test (P)	0.626	0.005	0.005	0.006	0.218	0.129	0.130

Orientation statistics per group relative to geographic North (gN), magnetic North (mN), and relative to the trained magnetic compass (MC) direction. Sample size (n), mean direction, mean vector length as measure of scatter, and the P value for the Rayleigh test are given for each group. See Fig. 1.