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April 22, 2018

Why do goats have rectangular pupils?

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From Curiosity:

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Goats, like most other ungulates such as horses and hippopotamuses, have rectangular pupils.

This unique shape helps goats see 280° around their bodies, but the horizontal pupil makes it difficult for them to see much on the vertical axis.

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This eye shape is more common in herbivores, whereas vertically slit pupils are the norm for predatory animals.

According to Wikipedia, "Goats have horizontal slit-shaped pupils, an adaptation which increases peripheral depth perception."

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More?

See "The Evolution of the Rectangular Eye."

April 22, 2018 at 12:01 PM | Permalink


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