This result means that UV wavelengths are seen as distinct colors by birds and that UV cones participate in a tetrachromatic visual system.
这个结果意味著，鹦鹉会把紫外光波长看成不同颜色，而且，紫外光锥细胞参与了四色色觉系统。
2
Ours is still the result of an evolutionary reclamation job and remains one pigment short of the tetrachromatic visual system found in birds and in many reptiles and fish.