Why do these cows have eyes on their buttocks?

It looks pretty crazy and it might seem like a joke: painted eyes on cow’s buttocks. Yet they are very handy for farmers in the African country of Botswana. It protects the cows against predators.

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Many lions live in the country. Because cows have trouble running away, they’re easy prey. The painted eyes frighten predators

Researchers have looked to see if the dyed eyes really help to protect the cows. For example, they painted crosses on the buttocks on one part of the herd’s eyes, and on another part they painted crosses on the buttocks. They didn’t paint anything on the remaining cows. After four years it turned out that the cows with eyes were the least killed.

Cows are not the only animals that are safer with eyes on their bodies. Some butterflies, fish and birds also have fake eyes.