The distinction between venomous and non-venomous snakes is mainly based on the following points:

1. Venomous glands: Venomous snakes have venom glands, while non-venomous snakes do not. Venom glands evolved from salivary glands. Located on both sides of the head and behind the eyes, it is contained in the jaw muscles and can secrete venom. When a venomous snake bites something, the muscles surrounding the venom glands contract, and the venom is injected into the body of the bitten object through the venom duct and the tube or groove of the fangs to cause poisoning. Non-venomous snakes do not have this function; [1]

2. Venom tube: It is a tube that transports venom, connected between the venom glands and fangs. Only venomous snakes have venom tubes;

3. Venomous fangs: Venomous snakes have venomous fangs, which are located in front or behind the non-venomous fangs on the maxilla, and are longer and larger than the non-venomous fangs.

4. Color: The non-venomous snake Yellow Chain Snake (also called Yellow Chain Snake) is easily confused with venomous snakes due to its color spots. Because of the black and yellow horizontal stripes on its back, it is often mistaken for a krait.

5. Appearance: The body is thick and the tail is short, the back is brown, with two rows of thick dark brown patches, the head is slightly triangular, and the shape is very similar to a viper or; emerald snake (also known as Green bamboo logo), because the whole body is green, so it is often confused with bamboo leaf green. Extended information

Snake is the general name for reptiles with degenerated limbs, belonging to the order Snakes of the class Reptiles. Like all reptiles, snakes are covered in scales.

The body is slender, the limbs are degenerated, there are no movable eyelids, no ear holes, no limbs, no forelimb belts, and the body surface is covered with scales.

Some are poisonous, but most are not. In addition, the zodiac sign "Snake" is also included in the "Twelve Zodiac Signs".

Reference Snake＿Baidu Encyclopedia