Why Do Sheep Have Rectangular Pupils?

sheep-pupils

Sheep are not the only animals with rectangular pupils, Goats, cattle, deer, llamas, and many other grazing animals have similar shaped pupils. They may look odd but they have a very important function.

These animals are generally considered prey animals and they have an evolutionary survival need to be alert for signs of danger at all times. These large rectangular pupils give the animals panoramic vision, allowing them to survey the horizon for potential threats.

sheep-pupil

The shape of an animal’s pupil is linked to their ecological niche.

As many of these animals live in open fields, it also helps the eye to gather more light from the ground and less from the dazzling sky. Conversely, predatory animals have slit-shaped pupils to help focus a target and judge how far away prey is, helping them to stalk and pounce.

Related Posts
African penguins (Spheniscus demersus) look much like the Humboldt penguins. They have a broad band
Anacondas are four species of aquatic boa inhabiting the swamps and rivers of the dense
Africanized Bees are also known as Africanized Honey Bees as they are a honey producing
The Alpine Ibex (Capra ibex) lives in rocky regions along the snowline above alpine forests of the
An Alligator is a crocodilian in the genus ‘Alligator’ of the family ‘Alligatoridae’. Alligators are
The Aquatic Warbler (Acrocephalus paludicola) is an Old World warbler who breeds in temperate eastern

Leave a Reply

Your email address will not be published. Required fields are marked *

Animal Encyclopedia