Animal Natural Phenomena Off Snails Natural Activities Observe snails

Observe the snails. Snails and slugs are often considered garden pests, and they are actually pests, but they also play an important role in nature. The garbage they produce and the corpses they die are plant-fed and a delicious snack for other animals.

They also do the job of decomposers, which is to break down decaying materials (such as dead leaves or branches). Snails and slugs walk with a large "foot," a muscle that runs along the base of their bodies. With the help of mucus secreted by the body, they can move on any surface.

The marks left by their mucus can also send a signal to other snails or slugs: "There's something delicious here!" Or, "Danger, there's a predator here!"

Although snails and slugs have no way to distinguish colors, they do have two eyes on their antennae that sense sunlight, and if poked, they retract into their bodies.

Material. Snails or slugs Magnifying glass A piece of clear plastic (you can find it from inside the resource box, or buy a piece of plastic glass from your local hardware store).

Steps. 1.Lead snails or slugs to climb onto the plastic, or just place them on the plastic and look at their bodies through the bottom of the equation to see how they move. Can you see that big "foot" muscle pushing its body forward?

2.Look at it from a different angle. Can a snail or a slug climb upright? What about climbing vertically?

3.Observe the light and shade of a snail or slug. What happens if you wave your hand quickly around its head?

4.If you're willing to take a snail or slug in your hand, gently pick them up and let them move slowly around your hand. Can you feel its big "foot" muscles moving?

Once you've taken the snail or slug down, you may find it difficult to wash off the mucus left in your hand. You can use a scrubbing brush or a textured sponge, both of which are most effective at cleaning away the slime. If you have taken a snail or slug, be sure to wash your hands well.

Outreach activities. Just like plants, creatures such as snails or slugs can be local or exotic. Research whether the snails or slugs you come into contact with are native or foreign.

If you find it foreign, go out and look for it to see if you can find a native snail or slug.

In addition to snails and geckos, animals with regenerative abilities include sea cucumbers, starfish, ctenophores, salamanders, and the American newt.

One: sea cucumber. Sea cucumbers have a strong ability to regenerate, and elementary school textbooks have also described that when sea cucumbers encounter predators and cannot escape, they will use a cruel-looking method to protect themselves, that is, to spit out the internal organs in their bodies, so as to confuse the predators and escape themselves.

After escaping, the sea cucumber will regenerate its internal organs after a while.

Two: Starfish. It can be said that the regenerative energy of the starfish is the doppelganger technique. Every part of the starfish can be regenerated into a new starfish in the sea, and even some fish with strong regeneration ability can still grow into a new fruit toy if they are thrown into the sea.

Three: Ctenophores. Ctenophores look the same as other jellyfish, with no noticeable difference in appearance.

The growth process and nervous and muscular systems of the ctenophora jellyfish are different from other marine organisms, seemingly ordinary marine creatures, but they have a unique nervous system, which can regenerate a brain in just four days.

Four: Salamanders Salamanders are able to regenerate not only limbs, but also internal organs. Similar to sea cucumbers, the process of tissue regeneration in salamanders does not produce scarring.

In addition to having the "holy grail" of injured spinal cord and brain injury, the cells of the newt's regenerated limbs also have some memory functions that can regenerate new bones, muscles, and nerve tissue. Studying the memory function in the salamander can help with the regeneration of human amputations, while studying the healing process of the salamander can help develop a series of new diseases for a large number of common diseases, such as heart and liver disease

Five: Axylum melletus. It is a salamander, it has an extraordinary ability to regenerate, limbs and tails will not heal themselves in the form of scars, but will grow new limbs within a few months, and it can even regenerate very complex body parts, including part of the brain and spinal cord, they have a strong ability to accept foreign organs, and the eyes and part of the brain can be completely restored to normal after transplantation.

Earthworms also have the ability to regenerate.

If you cut the earthworm in two sections in the middle, it will grow into two whole earthworms.

In addition to earthworms, there are also starfish, crabs, lizards, sea cucumbers, octopuses and other animals, all of which have the ability to regenerate.

Leeches can too. Like snails and geckos, leeches can survive after being cut into sections, and all their organs will evolve again.

The most powerful regenerative animals in the world can regenerate not only organs, but also brains.

We often use the term "snail crawling" to describe its slow speed. Actually, it is precisely said that snails do not crawl, but glide. Wherever it passes, it has a layer of nián secretion, so that even if the snail climbs on a sharp blade, its body will not be cut.

The snail is afraid of the sun because the sunlight will dry its body. It spends most of its time sleeping in its shell, which is also closed with a layer of mucus. It can sleep for months on end throughout the winter.

The snail's mouth is smaller than the tip of a bamboo, but it has 25,600 teeth. Of course, these teeth are invisible to our naked eyes. If we put the snail in a cardboard box, it can escape with a hole in its teeth.

Its eyes are at the tips of its antennae, but its vision is weak. Fortunately, its sense of smell is extremely sensitive, which makes up for the lack of vision.

Because snails like moisture and are afraid of flooding. When wet, the snail's appetite is active, but flooding can suffocate the snail. So snails crawl after the rain in order to forage for food and to avoid flooding.

Snails are sensitive to environmental responses and are best suited for the environment: temperature 16 30 (23 30 at 23 30, the fastest growth and development); Air humidity 60% 90%; The humidity of the feeding soil is about 40%; The pH is 5 7. When the temperature is below 15 and above 33, it is dormant, and when it is lower than 5 or higher than 40, it may freeze to death or heat death.

There are 40,000 species of snails all over the world, and snails are distributed in all provinces and regions of China, living in dark and humid areas such as forests, shrubs, orchards, vegetable gardens, farmlands, parks, temples, mountains, flatlands, hills, etc. It feeds mainly on plant stems, leaves, flowers, fruits and roots. It is one of the agricultural pests and an intermediate host for some parasites of livestock and poultry.

Snails have high edible and medicinal value. Rich in nutrition, delicious, high protein, low fat, low cholesterol, rich in more than 20 kinds of amino acids and rich in snail enzymes, SOD, etc., the protein content is 1, 11, 3 and 7 percentage points higher than that of soft-shelled turtle, pork, beef and eggs respectively.

The fat content is only 1 and 1 70 of soft-shelled turtle, pork, beef and eggs. The snail is a terrestrial mollusk with high edible, medicinal and health value, and its edible and medicinal history has been more than 2,000 years.

After rain, the soil water will accumulate, the snail will be soaked, and it is very stuffy to make it impossible to breathe, and the air and temperature and humidity after the rain are also very suitable for the growth of snails, and they will take advantage of this excellent weather to come out to forage for food and mate.

Snails like to burrow into loose humus soil to inhabit, lay eggs, regulate the humidity in their bodies and absorb some nutrients, but they are very afraid of flooding, and if they do not crawl out in time after rain, they will drown.

Personally, I think. Rain leads to an increase in humidity in the atmosphere. At the same time, snails are very moist creatures. It is possible to avoid the trouble of dryness, as the snail has a layer of mucus. Have you ever seen a snail in a dry environment (not to rule it out).

Purpose. Since there are so many snails coming out of the house (shells), after all, it also increases the chance of reproduction. You can find a lot of mates, which increases the chance of breeding.

The natural enemies of snails mainly include terrestrial firefly larvae, flea flies, dragonflies, walking insects, chickens, ducks, birds, toads, turtles, snakes, hedgehogs, rats, etc. In addition, snails die of dehydration due to the fact that there is no presence similar to the cuticle, after contact with quicklime or table salt.

There are many natural predators of snails, such as chickens, ducks, birds, mice, etc.

Recently, the rain in the south is too thick, and there is a heavy rain warning every few days, and there is a wave of showers from time to time, which is really annoying. After the rain, the outdoor environment and indoor environment will become very humid, and many small animals will come out to move. We welcome this, and it brings a lot of life.

What is this big snail?

After the rain, in the roadside or in the green belt of the community, there are many big snails, there are many children out of curiosity will tease these snails, and even take it home, here to remind everyone that this big snail carries a lot of parasites and pathogenic bacteria, can not let children touch more unusable, it is understood that this big snail is called African giant snail also known as brown cloud agate snail, in the first half of the 20th century, an overseas Chinese from Singapore to transport back to China in the plant, unintentionally entrained the eggs and young snails of the African giant snail, Since then, the giant snail has begun to breed in Xiamen and further spread to other regions, becoming one of the first 16 invasive alien species in China. <>

What are the dangers of this large snail?

Experiments have found that the mucus or feces of this African giant snail carry a lot of parasites and pathogenic bacteria, especially Angiostrongyloides cantonensis in a certain place, and the infection rate is between that of a snail. That is to say, there are likely to be hundreds of such parasites in an African snail, Angiostrongyloides cantonensis, if it enters the human body through the mouth, it will parasitize in the central nervous system or mid-cerebrospinal fluid of the human body, causing meninges and encephalitis, meningitis and myelitis, and the disease can be fatal or disabling in severe condition. <>

How to avoid strongyloides infection?

Do not touch African giant snails, slugs, freshwater snails, and other animals that may cause infection. 2. Change bad eating habits, avoid raw or semi-raw freshwater snails, fish, shrimp, snails, etc., and avoid drinking raw water. 3. After processing the above-mentioned food that may be contaminated by the larvae of Angiostrongyla cantonensis, it is necessary to fully clean the hands and operation area to avoid contamination.

Fourth, the staff who process snails should pay attention to hygiene and do a good job of protection in their daily lives. <>

When you encounter this kind of big snail, it is best not to touch it with your hands, because they have a large number of germs on their bodies, which is very dangerous, and it is best not to kill them by some means.

When we are faced with this big snail, we must not touch it with our hands, because it has a lot of bacteria and pathogens on its body, which can be hit with relevant ** and let professionals deal with it.

It can be eradicated, and if left unchecked, it is likely to be allowed to overflow, causing harm to native species.

Snails are mollusks.

Snail is not a biological taxonomic name, but generally refers to all terrestrial species of the class Gastropoda. In general, Western languages do not distinguish between aquatic snails and terrestrial snails, and in Chinese, snails only refer to terrestrial species, although they also include many animals of different families and genera, but they are all similar in shape. Snails belong to mollusks, gastropods; Feeds on decaying plant matter and lays eggs in the soil.

It is most common in tropical islands, but it is also seen in cold regions. Arboreal species are bright in color, while terrestrial species are usually monochromatic. The agate snail in Africa is the largest, mostly more than 20 cm.

Several species of the genus Snail in Europe are often used as delicacies, especially in France. Snails are one of the most common mollusks on land, and snails have high edible and medicinal value.