四色視覺

四色視覺（英語：）是指生物体拥有四种独立的感光通道，或指眼球中有四種感色的视锥细胞（較人類多出感應紫外線的錐狀細胞），大部分鳥類具有此種特徵。一般人類所繪製出的圖案對四色視覺者可能是難以理解的。

梅花雀视锥细胞的感光响应曲线，其感光范围从可见光到紫外线[1]

参考文献
  1. Figure data, uncorrected absorbance curve fits, from Hart NS, Partridge JC, Bennett ATD and Cuthill IC (2000) Visual pigments, cone oil droplets and ocular media in four species of estrildid finch. Journal of Comparative Physiology A186 (7-8): 681-694.
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