So, if you ever see slit-like eyes staring at you, definitely move away slowly! A venomous snake has pupils that are ellipse-shaped. There are many creatures that can frighten a snake, and it’s highly likely that a snake could be afraid of a cat. Cat snake, any of several groups of arboreal or semiarboreal rear-fanged snakes in the family Colubridae with eyes having vertically elliptical pupils similar to those found in felines.Cat snakes are nocturnal hunters that become active at twilight. First of all, if you see a snake whose eyes resemble a cat’s eye, it is almost sure that it is venomous.

Snakes will try to avoid cats. It is found as far north as Bulgaria and the northeast corner of Italy. If the snake can’t escape, it will use defensive behaviors like hissing, rearing up, tail shaking, and striking. Although it is more or less harmless to humans, the cat snake does use a weak venom to subdue its prey. The snake's range continues east through the Caucasus to western Asia. The snake is considered sacred on some Greek islands. The cat snake lives in the Balkans and Greece.