Some birds, insects, and fish have photoreceptors that respond to the ultraviolet light (shorter wave lengths than humans can see), and some snakes, insects; and vampire bats have receptors that can respond to infrared radiations or heat (longer wavelengths than humans can see). Certainly those animals can see spectral “colors” that we cannot and their perceptions are presumably different from ours - Reductionism in Art and Brain Science page 42, Zettel 147
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