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Second, snakes, pinyin: shé. The ancient word for it, poisonous insect also. From bugs. It was originally a worm, but later it was added to the left of commonly used words. In ancient times, grass lived in it, so it asked, "didn't it?" -"Shuo Wen"
Know, from the worm, from it. The original meaning of "it" is "wandering snake" "Bug" refers to "lIttle reptile", and the combination of "Bug" and "it" is "Bug wagging its tail". Original meaning: an insect that wags its tail and moves.
3. Snakes belong to Lepidoptera. There are other nicknames such as snake, viper, viper, viper and so on. According to species, there are synonyms such as viper, viper, python and viper. , belonging to the scaly order. The body is slender, the limbs are degraded, and the body surface is covered with scales. Although the snake is slender, it is a vertebrate. Most of them are terrestrial, but there are also semi-arboreal, semi-aquatic and aquatic. They are distributed all over the world except Antarctica, New Zealand and Ireland. Feeding on mice, frogs, insects, etc.
Snakes belong to reptiles and snakes, and they are real terrestrial vertebrates. It's terrible to have poisonous snakes, but it's not that dangerous as long as you pay attention. Snakes mainly eat mice (frogs, birds, etc. ). Snakes are ugly, with strange shapes and colors, covered with scales, high head and neck, swinging tail, moving fast, courting and swimming, which is really hard to please. Snakes like to live in cool, humid, inaccessible, overgrown with weeds, lush trees, wooden tree holes or piles of rocks, woodpiles, haystacks, ancient ridges, and places rich in bait. These are the places where they live, haunt and breed. Some snakes live in water.
They live in the tomb cave, and thick granular feces can be seen at the entrance, so that we can know whether there are snakes in the cave. Snakes have the habit of hibernating. In winter, they sleep in caves. They slept for months without eating or drinking and did not move. When the weather is fine, I occasionally come out to bask in the sun and sometimes eat something. When spring blooms, the snake wakes up and begins to go out for food, taking off its original coat. When molting, a liquid will be secreted between the old and new skin of the snake, which will help the snake molt. The weight and even the name of a snake can be measured from the diameter and length of its shed fur. Shortly after the snake molts, its activity and foraging amount increase, and its physical condition gradually recovers. As the temperature rises gradually, it enters estrus from late April to mid-May. When looking for a mate, the chirping of male and female snakes is crisp and bright, and "dadada" seems to hit a stone.
The spawning period of snakes is generally from late April to mid-June, which varies from species to species. The laid snake eggs are generally bonded into a large egg mass, and the number of eggs in the egg mass varies from 8 to 15. Snakes are often hungry or semi-hungry. Generally, they prey by "waiting for the rabbit", but sometimes they will take the initiative to attack. The author once witnessed a bamboo snake chasing a frog by the river. The frog jumped into the river, and the snake jumped into the river, just like two divers in tandem. I've also seen snakes prey on birds' eggs. It crept up the wall near the eaves, swam to the swallow's nest and kept sticking out its tongue, scaring away the parent birds. When the snake finds its eggs, it attacks and entangles them first, and then opens its mouth to swallow them when it is safe. Don't think its mouth is small. In fact, it can swallow food 8 ~ 10 times larger than its head. After eating enough food, the snake feels very tired and enters a rest state, which is easy to be caught. As for the frequency of feeding snakes, it varies with the variety and size of snakes. Generally, the peak of foraging activities in summer, especially the spawning and breeding period, is once a day or once every other day. If the snake is a little bigger, it is usually eaten once every 3 days to once a week because of its great foraging ability. Snakes also like sunbathing, usually from 10 to 12 in the morning. When sunbathing, people usually lie on the grass on the ground or wind around the trunk, and some are half naked outside the hole and curled up outside the stone pile with different postures. The law of snake activity is mostly day and night, which varies from species to species.
Snakes have a very powerful digestive system. Some began to digest while swallowing, and even spit out bones.
Also, the snake's digestion is crawling on the ground and rubbing the uneven ground with its stomach.
The venom of a poisonous snake is actually the digestive juice of a snake. The digestive juice of some snakes has strong digestion ability and can dissolve the bodies of bitten animals, so it is "toxic", and human bile also belongs to this digestive juice. But more are neurotoxins and muscle toxins.
Snakes have a big appetite and eat a lot. They usually kill them first and then swallow them. The mouth can change with the size of the food. When encountering larger food, the lower jaw becomes shorter and wider, forming a film that tightly wraps the food. Snakes are often swallowed from the animal's head, while birds swallow from the top of their heads, so that their beaks bend to the bird's neck without stabbing Shekou or esophagus. Swallowing speed is related to the size of food. Snakes can swallow mice in 5 ~ 6 minutes, while larger birds need 15 ~ 18 minutes. Barton believes that only when the nose or ear position of prey is determined, Rock Python in Africa begins to swallow. Vipers also have the ability to judge the head and tail of their prey.
Snakes digest food very slowly, and it takes 5 ~ 6 days to digest it once, but the peak of digestion is mostly 22 ~ 50 hours after eating. If you eat too much, it will take longer to digest. The digestion speed of snakes is related to the external temperature. Skoczylas( 1970) observed that the snake's digestion stopped completely at 5℃, and it was still slow at 15℃. The digestion process lasted about 6 days, and it was accelerated at 25℃.
Snakes' teeth can't bite food. The digestive system of snakes, such as pharynx, and the corresponding muscle system have great expansion and contraction capabilities.