Table 1.

Results from discriminability calculations using low light intensity and open habitat irradiance. Comparisons were made using the blue tit (Parus caeruleus) and chicken (Gallus gallus) cone sensitivities, and are based on mean values (n = 12). Spectra comparisons fell below the threshold of one just noticeable difference (JND). FV, forewing ventral; HV, hindwing ventral; L, light; D, dark.

JND comparisons	FV-L pink versus model pink	FV-D pink versus model pink	HV yellow versus model yellow	FV black versus model black	HV black versus model black
P. caeruleus	0.597	0.374	0.736	0.336	0.440
G. gallus	0.556	0.424	0.858	0.315	0.533