What animal groups are there?

The world is full of mysterious creatures, they constantly surprise mankind. There are many types of animals that are striking in their uniqueness.

Classification

There are such groups of animals:

• Mammals
• Molluscs, echinoderms.
• Fish, lancelet, cyclostomes.
• Birds.
• Reptiles.
• Amphibians.
• Arthropods.

Many groups of domestic animals have become human relatives, since without them he cannot imagine his life. But there are wild creatures that humans can never tame. By the way, the first animal that man subdued was a wolf. This happened about 15 thousand years ago. He became home, and over time evolved into a dog. Now this is man’s best friend.

How to determine the group of the animal?

Different creatures correspond to a certain group. The animal world is diverse, so each classification has its own characteristics. Namely:

1. Mammals include warm-blooded animals. They are covered with wool, their heart is four-chambered, and the mammary glands secrete milk. During childbirth, they have a lively cub.
2. Birds are warm-blooded animals that lay eggs. They are covered with feathers, have wings, a four-chamber heart.
3. Reptiles are cold-blooded animals. Their body is covered with scales, their heart is three-chambered, they lay their eggs.
4. Amphibians are also cold-blooded. Their heart is three-chambered, with the help of the skin they breathe, their larvae live in water. Water can penetrate the egg shell.
5. Chordates include some fish species and fish -like organisms on their list.

Varieties of living things depending on the food they eat

You can divide animals into groups according to the method of nutrition. There are herbivorous living things. They feed on leaves, seeds, fruits, roots, etc. Their oral apparatus has its own characteristics: they have more horn plates or incisors, molars. Nature thus created a device for grinding food of plant origin. But aphids, bugs, cicadas have a sucking apparatus, which gives them the opportunity to eat plant juices. In the digestive tract, additional departments are developed, such as a scar, a cecum. They allow you to process fiber. Herbivorous mammals have peripheral vision. Such animals have musculature rather rough and not so developed, as at predators of the same group.

Predators are animals that feed on other creatures. They have the ability to attack the victim. Among all teeth, fangs are considered the most developed; this difference is observed in mammals. The crocodile's mouth is elongated, while the shark has a certain number of rows of teeth directed inward. Birds of prey have developed and sharp claws. Predatory mammals have good visual acuity. Carnivores attack the victim in a special way: they wait, make a sharp jerk. They are hardy, have precise coordination, very fast.

In a special way, the starfish destroys the enemy. She crawls on the mussel, waits for the time when the leaves open, and then injects the enzymes into the sink.

But woodpeckers eat insect larvae that live under the bark of trees. To do this, they have a strong large beak, special paws with which the birds hold firmly on the tree trunk. Nature has created certain devices for each creature with the help of which it is possible to get food.

There are groups of animals that feed on the remains of organisms. A striking example is carrion birds. They have a long neck, narrow muzzle, good sense of smell. But, for example, the food of the larvae of flies is the organic remains of plants and animals.

Parasites are isolated from another group. They feed on the tissues and juices of their master. They are also adapted to their environment, as their bodies are not digested in the body in which they live. Parasites are very similar to predators, but they do not kill the host immediately. They use it as a place to live. These categories are divided:

• microparasites;
• macroparasites.

The following animals are usually parasites:

• round and flat worms;
• insects such as fleas, mosquitoes, bedbugs, mosquitoes, lice, midges;
• ticks;
• crustaceans;
• cyclostomes.

There are also groups of animals according to the method of nutrition that eat food of plant and animal origin. They are called omnivores. They are endowed with traits that resemble both predators and herbivores. Such animals are bears, crickets, rats. Of the reptiles, geckos, agamas and other reptiles are included here. This group includes people.

Interesting information about animals from different groups

There are some facts that amaze many people:

1. A giraffe has the largest heart. This animal has a black tongue, the length of which reaches 45 cm.
2. The bones of a garfish fish are green.
3. The cat is not able to move its jaws.
4. The heartbeat rhythm of a whale is 9 beats per minute.
5. The octopus has rectangular pupils.
6. A record flight of chicken was recorded. He is 13 seconds.
7. The caterpillar muscles prevail in number over the human ones.
8. The female armadillo is able to extend pregnancy to 2 years, if experiencing stress.
9. A titmouse sometimes feeds its cubs a thousand times a day.

Groups of dangerous animals

All entities in the world can be classified according to other criteria. For example, groups of animals that are dangerous to human life are isolated. At first glance, they may seem harmless. Such an animal is a mosquito. He is a carrier of malaria. The insect infects the infection through the blood. About 2 million people die from the bites of these animals every year.

The list of dangerous living creatures Australian jellyfish. She has very long tentacles that reach up to 4 meters. Their number in this case is 60 pieces. At the same time, a jellyfish can kill 60 people. And many other animals are dangerous to humans.

conclusions

So, to determine which group of animals a particular creature belongs to is not difficult. The main thing is to know by what criteria the grouping occurs. After all, animals are divided by place of residence, way of eating, classes, types and other factors. Each living creature is adapted to its environment, has its own characteristics, eats different foods.