Longwave-transmissive screening pigments and red-inclusive tetrachromacy are known for several members of this family. It is possible that this
species, too, possesses red sensitivity, but the site admin is unaware of evidence for that.
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Frentiu, F. D. & Briscoe, A. D. (2008) A butterfly eye's view of birds BioEssays 30:1151-1162
Warrant 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