The tooth marks of non-venomous snakes that bite people are circular, while the tooth marks of venomous snakes are two injury points, that is, two venomous fangs (venomous snakes have two longer venomous fangs on their upper jaws, and the venom comes from The medullary canal of the fang releases the injection into the bitten object) and penetrates the flesh into two wounds. Non-venomous snakes do not have these two long fangs, and their teeth are generally arranged in a flat ring. The venomous snake's head is triangular in shape with protruding gills. Non-venomous snakes have short tails and slow movements. When they are coiled up to rest, their heads are buried under their bodies. Non-venomous snakes have slender tails and are agile (or ferocious). When they are coiled up and resting, their heads are resting on top of their bodies (so you can pay attention to your surroundings). They are not poisonous. If there is poisonous pain, it is not poisonous; if itching or numbness is poisonous; if you don’t feel it, it may be poisonous or not poisonous; if the blood is normal, it is not poisonous; if there is no bleeding, there is no pain. After biting, the blood is black and is poisonous