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Old 10-02-2013, 01:08 PM
 
Location: Victoria TX
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Originally Posted by charolastra00 View Post
Who ever told you that ALL animals don't see color? That would render the protective coloring on some insects, snakes, and birds moot. Some species see colors, others don't.
Color vision is pretty complex, and evolves only as is necessary. So most species see limited color, according to the colors that are important to their survival. For example, it is widely held that birds only see the colors that they themselves wear, since color vision is important in recognizing mating behavior. They may also see colors associated with their primary food source.

For example, the violet-crowned hummingbird might be one of the few birds that can see violet, since they need to recognize mating display of their own species. In other species, violet might be either black or indistinguishable from blue. It is possible that some jungle birds cannot see green, which would enable them to have much better capability to distinguish their green world from non-green objects.

Honeybees see ultraviolet as a visible color, because it has survival value for them to be able to do so. Humans see it only as black.
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Old 10-03-2013, 06:26 AM
 
Location: Jenks, Oklahoma
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Ungulate vision uses shades of yellow, blue and gray only.
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