Presentation on the topic: Are animals dangerous? Dangerous animals - presentation
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Are there any dangerous animals? In general, all animals can be called dangerous. Animals are dangerous not only because they carry fleas, lice and dangerous diseases. Some animals (for example dogs) are dangerous because they can be aggressive and attack a person.
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Scorpio The mere mention of the word “scorpion” makes us think of dangerous poison. This is explained by the fact that meeting a Scorpio can be very unpleasant. Scorpions are related to the spider. The scorpion has four pairs of legs, two strong claw-like pedipal fingers, with which it usually holds prey. The scorpion also has a long articulated tail, at the end of which there is a pointed sting, connected by ducts to poisonous glands. When moving, the scorpion holds its tail in a curved arc above its body. Having caught the prey with its claw-like pedipal fingers, the scorpion bends its tail over its head and plunges its stinger into the victim. The venom either kills or paralyzes insects, spiders and other creatures that the scorpion feeds on. Basically, the scorpion is nocturnal, and during the day it hides in the shade, for example under a stone, under bark or in dark corners of the house. Adult scorpions usually live and wander alone. Scorpio is a viviparous animal, and after birth, small scorpions attach themselves to their mother's back, but she does not feed them, and after a few days the babies leave and live on their own. Scorpios live in hot climates. They vary in size from 1 to 17 cm in length, and the largest species are found in the tropics.
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Snakes In poisonous snakes, one of the salivary glands produces a substance that is dangerous to the victim. This substance is snake venom. The venom of some snakes is so dangerous that it can kill an elephant. For others, this substance is not so poisonous. They can only kill a small lizard. Right above the fangs there is a hole leading to the poison-producing gland. When a venomous snake bites, the venom enters the gutter and flows through it into the wound made by the fang.
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Poisonous animals are those animals whose bodies produce substances that are dangerous to the life and health of humans or any other living beings. These substances allow animals to defend themselves and their territory, as well as immobilize and kill prey during the hunt.
Main groups of poisonous animals
Some animals throughout life accumulate harmful elements in the body, eating poisonous plants or living in conditions of severe environmental pollution. This is how animals themselves become poisonous. You should absolutely not eat them, otherwise you may get poisoned.
Other animals They have glands in the body that produce poison. For the poison to be effective, it must enter the body or blood of the victim. To do this, in some animals, toxic substances are removed from the glands to the skin through special channels. For example, this is how the body of a poisonous frog works. If you touch the surface of her skin, you can experience severe pain and get burned.
Nature has armed the rest of the animals with wounding devices: sharp teeth, stings, thorns or thorns.
With their help, small lesions appear on the body of the prey, into which poison is injected, which subsequently enters the blood.
Poisonous species are found among arthropods, reptiles, and even mammals.
Dangerous representatives of the fauna of Russia
In Russia, as throughout the world, there are also dangerous animals, including poisonous ones. This report will discuss only a few of them.
1. Viper
Almost everywhere in the vastness of our country, with the exception of the Arctic, it is possible. It feeds on rodents, small reptiles and birds. The viper is not able to pursue prey, because it is not that agile. Snake stalks and bites its prey, which, due to the rapid action of the poison, loses the ability to resist.
2. Scorpio
Scorpions live in the southern regions of Russia in a fairly warm climate. They hunt insects, spiders and small mammals at night, killing them with a sharp poisonous needle at the end of their tail. Scorpios They grab their prey with their front claws, lift them up and insert their sting. The prey dies instantly.
3. Karakurt spider
Karakurt is a medium-sized black spider with bright red spots on the upper part of the abdomen. The venom of the karakurt is stronger than that of a rattlesnake. However Only females bite males are completely harmless. Karakurt spiders live in those regions of Russia where there are hot, dry summers and long, warm autumns.
4. Toaded frog
Poisonous toaded frogs are found near shallow bodies of water in the steppe and forest zones of the European part of Russia and the Far East. They are distinguished from other frogs by their warning bright color - dark red and yellow spots on the abdomen.
The mucus on the skin of fire-bellied toads is poisonous and causes burning and acute pain upon contact with it. The frog does not need poison to hunt the worms, beetles and snails on which it feeds. The poisonous skin protects the toad from attacks by predators.
5. Black Sea ruffe
This fish lives in the Black and Azov Seas. Its meat does not contain poison and can be eaten. Nevertheless, on the body of the Black Sea ruffe there are poisonous thorns and thorns.
6. Bees and wasps
These flying insects use a poisonous sting to protect their home from destruction. A wasp can use its stinging apparatus repeatedly, but after stinging a person or animal it dies.
If a bee or a wasp smells the poison of its fellows, this becomes a signal for it to attack the object, threatening the well-being of her family. And therefore, bee and wasp stings are often numerous, which is most dangerous for humans or animals.
Are mosquitoes and house flies poisonous?
Many people mistakenly classify insects that are well known to everyone as poisonous insects. Allegedly, when bitten, mosquitoes and flies inject poisonous saliva into the body of the bitten person. However this is wrong. The substances contained in saliva are not poisonous at all. They do not allow the blood to clot before the insect is satisfied. And the bites itch because the human body perceives the insect’s saliva as a foreign substance, antibodies are produced, and an allergy occurs.
Birds and mammals
Mammals and birds are not found among poisonous animals in Russia. And in general, there are quite a few poisonous birds and animals in the world. They live mainly in, and.
The most famous poisonous mammals are shrews. One of the poisonous birds is the thrush flycatcher, whose skin and feathers are very dangerous.
Any poisonous animal can harm a person, but will do so only for the purpose of self-defense. Therefore, you should always follow safety precautions: do not approach wild animals or their homes and remain vigilant.
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Mosquitoes The British newspaper The Daily Telegraph names the “ten” most dangerous animals on the planet that pose a threat to humans. Mosquitoes topped the list of deadly creatures. Two million people die every year from diseases carried by these insects.
“sea wasps” The Australian “sea wasp” jellyfish, one of the most poisonous sea creatures, is in third place. The toxins contained in its "tentacles" are enough to kill 60 people. Since 1884, sea wasps have claimed 5,567 lives.
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