Table 1. Spearman's rank correlation coefficients between calculated photoreceptor excitations for 101 visual baits used in three published field studies [5], [7], [11].

	R1-6	R7p	R7y	R8p	R8y
R1-6
R7p	0.645
R7y	0.890	0.803
R8p	0.967	0.659	0.949
R8y	0.938	0.547	0.727	0.838

All correlations significant at p<0.001; correlation coefficients>0.85 highlighted with bold text.