why are most animals colorblind?

Question

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Answer 1

I question the assumption. Most animals are
probably not colorblind. However, if by "animals"
you really mean mammals, then you are correct.
Most mammals are nocturnal and vision for
nocturnal animals does not require color vision, in
fact, as another answer points out, they are better
off with monochrome vision. Diurnal mammals
generally do have color vision, as in human beings.

Answer 2

Because most animals have to either see prey to catch it, or avoid being caught as prey themselves. Monochrome vision is better for sharper and night time vision, and so is favoured for survival. Colourblind people are less likely to be fooled by camouflage, for instance.

Answer 3

the same reason as why almost all birds can fly.
animals only recepeptors for 2 colors in their eye, green and red, as a result they cant see yellow

Answer 4

They dont really need to see in color..especially preditors instead of seeing in color they see in motion to hunt better and track prey better

Answer 5

they dont hav cone cells