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Fig. 3. (A) Log-reflectance spectra of eyeshine measured from a medio-ventral region of the dark-adapted eyes of Vanessa cardui (green filled circles) and Pieris rapae (red filled circles). The open circles are spectra following substantial photo-conversion of LW rhodopsin to blue-shifted metarhodopsin, for Vanessa (green open circles) and Pieris (red open circles). (B) Log-reflectance spectra of eyeshine measured from a medio-ventral region of the dark-adapted eyes of nymphalid butterflies Vanessa cardui (green filled circles), Nymphalis antiopa (black filled circles), Inachis io (orange filled squares), Siproeta stelenes (cyan filled circles), and Junonia coenia (blue filled circles).