Technically, snakes do not hear because they don't have ears. Specifically, they are deaf to sounds that travel through the air. However, they do manage to sense what would be sounds to animals with ears. However, the snake does have an inner ear.Know More
Sound waves strike the snake's skin, pass through the muscles, and then to the bone that attaches the inner ear to the skull. The part of the snake's body that makes contact with the ground also feels vibrations keenly, especially the bones of the jaw. These vibrations are passed on to the cochlea, an organ in the inner ear that is shared by both snakes, other reptiles and humans. Hairs in the cochlea pick up these vibrations. The animal's brain then processes footfalls or the movement of potential prey or predators.
Some biologists believe that the snake's lack of an external ear is the result of their ancestors' habit of burrowing. These ancestors were lizards. It's believed that the ears were lost to remove the risk of them filling up with soil and also because the animal couldn't hear airborne sounds underground anyway.
Other scientists believe that snakes evolved from mosasaurs that lived in the seas. Mosasaurs lost their hearing because external ears were useless under water.Learn more in Snakes
Not all snakes are venomous, but even nonvenomous snakes are subject to strike if they feel frightened or sense danger. An easy way to determine if a snake is poisonous is to look at its pupils; the pupils of poisonous snakes are elliptical, much like the eyes of a cat, while the pupils of a non-venomous snake are round.Full Answer >
Snakes are cold-blooded. They become cold if the temperature gets cold. Since snakes cannot maintain their own body temperature, they move to warmer climates to stay warm.Full Answer >
Snakes use a variety of techniques and adaptations to defend themselves, including camouflage or fleeing from predators, as well as bluffing, biting and envenoming animals that threaten them. Most snakes seek to remain undetected by threatening animals and flee upon detection. However, snakes that are unable to escape may engage in a variety of defensive displays or deliver possible life-threatening bites.Full Answer >
Snakes breathe by moving the muscles that surround the ribcage. They lack the diaphragm that drives the respiratory process of mammals. A muscular contraction pushes air out of the lungs. When the muscles relax, the lungs fill with air.Full Answer >