What shape are the pupils of the Lycodon capucinus?
Answer
Vertically elliptical
A distinguishing characteristic when observing the eye structure of the Common Wolf Snake is the shape of its pupils, which are vertically elliptical. This vertical slit is a common adaptation among many nocturnal predators. This morphology allows the pupil a wide range of contraction and expansion; it can open extremely wide in low-light conditions to maximize light capture necessary for nighttime hunting, and conversely, contract down to a very thin line when exposed to brighter light. This superior light control mechanism distinguishes it visually from many diurnal snakes that possess round pupils.
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