The tiger-spotted colubrid snake, also known as the tiger-spotted colubrid snake, belongs to the Colubridae family and belongs to the group of colubrid snakes. People generally call it "pheasant neck". The tiger-spotted neck-grooved snake is only 0.8 meters long and weighs no more than 400 grams. The biggest appearance feature of this snake is that there is an obvious neck groove on the back of the neck and huge black plates on both sides. The back is usually emerald green. It is a kind of snake. A dazzling looking snake.

Is the tiger-spotted trough snake venomous

As far as the country is concerned, the tiger-spotted trough snake is a controversial snake. Many people think that it is docile and non-venomous. Snake, some people think it is a venomous snake (this is true for those with allergies). And in Japan, although the tiger-necked snake is classified as a venomous snake, many people still keep it as a pet.

Comparison of tiger-spotted grooved snakes

Compared with ordinary tiger-spotted grooved snakes, the giant tiger-spotted grooved snake has venomous teeth and looks like a "docile" snake without venomous teeth. , when the tiger-necked snake encounters its favorite food - a toad, the sickle-shaped fangs hidden in the tiger-necked snake will scrape open the prey's skin, which just allows the bloated tiger-necked snake to "deflate" , which makes it easier for the tiger-necked snake to swallow.

The hidden fangs are just a tool to help the tiger-spotted snake find food. Its real weapon is actually the rare "double venom glands". For venomous snakes, the venom glands directly determine how much venom the snake can excrete, and the more venom it excretes, the more poisonous it is. It is helpful to kill prey as quickly as possible, but the venom of the tiger-spotted snake is only used to create wounds. The venom can only enter the prey's wounds through secretion. Moreover, the amount of venom excreted by the tiger-spotted snake is much smaller than that of other venomous snakes.

The evolution of tiger-spotted snakes

In order to make up for its shortcomings, tiger-spotted snakes have evolved a special gland called "Duforno's gland". The biggest feature of the body is that it secretes venom through branched complex acquisition. In other words, the way the tiger-necked snake snake secretes venom is closer to secreting "saliva". The prothrombin activating substance in its venom mainly acts on fibrin. It can cause severe bleeding symptoms. Scientists once used the venom of the tiger-necked snake on mice. They found that after the mice were bitten by the snake, the skin near the wound was congested and they lost consciousness a few hours later.

Results after being bitten by a tiger-necked snake

Although the poison of the tiger-necked snake is mild to ordinary people, it will still occur as long as it is bitten. Symptoms include redness, congestion, and even body pain. For those with allergies, the poison of the tiger-necked snake is even more deadly.

One of the snakes, called the "Northern Smurf", is extremely venomous. It is no exaggeration to say that its venom is comparable to that of the five-step snake, and some people even challenged him. Some of us say that even if we are bitten by it, it will be fine, but in Japan, this snake has been classified as a venomous snake, even higher than the Japanese viper, that is, the tiger-necked snake.

Introduction to the tiger-spotted neck snake

The tiger-spotted snake is also known as "chicken neck", "pheasant neck", "green bamboo pole" and "cockscomb snake". This disease is very common in our lives, even in severe winter areas such as Tibet and Heilongjiang. Especially in rural areas of our country, people have become accustomed to this disease.

1. Main distribution

Tiger-necked snakes can often be seen in rice fields, ponds and ditches in farmland. But it is worth noting that even the extremely widespread tiger-necked groove snake has been listed as a near-threatened species by the International Union for Conservation of Nature.

2. Subspecies of tiger-spotted trough snake

Tiger-spotted trough snake is mainly divided into three subspecies: Chinese subspecies, Taiwanese subspecies and Japanese subspecies. In these areas, the Japanese pay more attention to the tiger-spotted snake. Because there have been cases of fatal bites, Japanese residents classified the tiger-spotted snake as a venomous snake and developed related serums.

3. The disadvantages of tiger-spotted snakes

The venom of tiger-spotted snakes belongs to the rear fangs. Not only are they not longer than the throat, they are sickle-shaped and have no grooves, with only the last two fangs. The jaw teeth are enlarged. Not only do the anterior and posterior molars have no tubes, but even the posterior molars don't have them either. The tiger-necked snake needs to inject venom when it swallows its prey. The venom can only flow from the fangs to the bite site, and it takes a long time to "bite hard" to cause poisoning.

The defect of the venom itself limits the toxicity of the tiger-spotted snake. Even if it bites a human body, it is difficult for the venom to flow into the wound. Even if the venom flows into the wound, it is usually only Slight poisoning, not life-threatening. The tiger-spotted snake has a more "cowardly" personality, and generally does not get angry easily and is very docile. Even if it is caught in the hand, its "first thought" is to escape, and it rarely moves its mouth directly.

4. The "special function" of the tiger-spotted snake.

For snake venom, one of the most important factors is their detoxification ability and toxicity. If the toxicity is so high that even if the toxicity is very small, it can kill with one blow. If the toxicity is small enough to kill a venomous snake, but if it is very toxic it can still kill a venomous snake.

Because the tiger-necked snake has no sacs usually used to store venom, the amount of venom is not large (average 11.8mg), and the venom is produced through a process similar to "secretion", which is different from ordinary snakes Detoxify with a squeeze. However, the toxicity of the tiger-necked snake (LD50 subcutaneous injection is 9.2 mg/kg, and the intravenous injection reaches 0.265 mg/kg) is comparable to that of the sharp-nosed adder (five-step snake). There is a prothrombin activator in its body. Once it enters the body, It will cause severe bleeding symptoms and subcutaneous congestion at the wound. But it is usually not serious and usually does not cause death.

5. Tiger Spotted Neck Snake's "Great Transformation Method"

Friends who have seen "Dragon and the Eight Parts" should know the phrase "the great immortals of the stars have boundless power", Ding Chunqiu Relying on the fragrance of the divine tree Wangding to attract various poisons in the world, such as toads and centipedes, he developed the "chemical engineering method". And this tiger-necked groove snake has similarities with it. There is a very special neck gland on the back of the tiger-spotted snake (this gland is distributed in all genus of snakes). Unlike other venom glands on the body, this gland can swallow and absorb the toxins in the venomous body, instead of produced by itself. The neck of the tiger-spotted snake is arranged vertically and parallel in the center. There are 8 to 13 pairs of glands on its back. Each small gland exists independently and there is no obvious detoxification duct.

Tiger-necked snakes mainly feed on frogs, toads, tadpoles and small fish. In a few cases, they also eat insects, birds and rats. The toxins of the tiger-necked snake are mainly derived from swallowing toads, thus forming the "special function" of easily detoxifying without opening the mouth.

An experiment was conducted in foreign countries, where tiger-necked snakes with widely distributed toads were collected and tiger-necked snakes in areas where toads were not distributed were analyzed together. Then the neck fluids were extracted separately, and it was concluded that the tiger-necked snakes that had swallowed toads contained a large amount of toxins, while the tiger-necked snakes that had not swallowed toads had no toxins in their bodies. After analysis, it can be seen that many components of this venom are similar to those secreted by toads. The main function of the neck fluid is to help the tiger-spotted neck snake escape when it encounters an "enemy". When it is attacked, its head and body will stand up and its neck will be stretched. This action will also squeeze out the neck glands and splash out. It shoots white or light yellow neck fluid with a very fishy and unpleasant smell, which can frighten the "enemy" in a short time.

Neck fluid has a strong irritating effect on mucous membranes and has a certain degree of neurotoxicity. Redness, swelling and pain will occur when the eyes are injured. However, the toxin content in this cervical fluid is not high, with LD subcutaneous examination not exceeding 90 mg/kg, and if there are no "holes" in the wound or face (such as eyes, mouth, nose, etc.), it is difficult to cause poisoning.

Conclusion: The tiger-necked snake's docile temperament and its own shortcomings greatly reduce its venom. Although it does little harm to humans, you must not challenge its "authority". After all, the venom of the tiger-necked snake is comparable to that of the sharp-nosed adder. It can really kill you if you are not careful, so don't take it lightly.