Longwave-transmissive screening pigments and red-inclusive tetrachromacy are known for several members of this family. It is likely that this
species, too, possesses red sensitivity, but the site admin is unaware of evidence for that.
Steiner, A., Paul, R., Gemperlein, R. (1987) Retinal receptor types in Aglais urticae and Pieris brassicae (Lepidoptera),
revealed by analysis of the electroretinogram obtained with Fourier interferometric stimulation (FIS).
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Briscoe, A. D. & Chittka, L. (2001) The Evolution of Color Vision in Insects. Annu. Rev. Entomol. 2001. 46:471-510
Frentiu, F. D. & Briscoe, A. D. (2008) A butterfly eye's view of birds BioEssays 30:1151-1162Warrant E.J., Nilsson D.-E. (1998) Absorption of White Light in Photoreceptors. Vision Res., Vol. 38, No. 2, pp. 195-207. PII: S0042-6989(97)00151-X
Stavenga D., Smits R.P., Hoenders B.J. (1993) Simple Exponential Functions Describing the Absorbance Bands of Visual Pigment Spectra. Vision Res. 33(8) pp. 1011-1017. doi:10.1016/0042-6989(93)90237-Q