The colors in a flower patch appear completely different to a bear, a honeybee, a butterfly and humans. The ability to see these colors is generated by specific properties of opsins—light-sensitive proteins in the retina of our eyes. The number of opsins expressed and the molecular structure of the receptor proteins determines the colors we see.
Click here for original story, The evolution of red color vision in lycaenid butterflies linked to coordinated rhodopsin tuning
Source: Phys.org