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What do goats, sheep, octopuses, and toads have in common?
- All have rectangular pupils:Because goats, sheep, octopuses, and toads are usually treated as prey by the predators in their natural environments, they need to be on their game when it comes to defense, both day and night. For this reason, they've all developed rectangular shaped pupils in their eyes. This shape to the pupil allows them to survey their surroundings with a higher degree of accuracy. When the pupil is narrow in relation to the horizon, it gives the animal a greater accuracy in depth perception, especially in its peripheral vision. Depth perception is important for these animals who often spend their lives evading predators when in a non-domesticated environment. Source: Science20.com
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