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。
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.