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They are not colour blind. They simply cannot see the full visible spectrum of colours like humans can. Cows, oxen, heifers, steers and bulls, among many other grazing animals, can only see bluish and yellowish hues, but not reddish hues, unlike the bull-charging-at-red myth implies. This is simply because a bovine's eyes lack red receptors and only have blue and yellow receptors.

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13y ago

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