How many species of animals are there in the world, how many species of animals are there in the wor

Taxa are described in terms of 10,000 species and estimated 10,000 species.

Viruses 40, bacteria 100

Fungi 150

Protozoa 20

Algae 40 Higher Plants 32

Nematodes 40 Crustaceans 15

Arachnids 75

Insects 800*** the most.

Mollusks 50

Vertebrates 5

Others 25 for a total of 1362

After hundreds of years of investigation, scientists have discovered and named more than 1.2 million animal species, including about 40,000 species of protozoa, 10,000 species of arachnids, the largest number of insect species, 950,000 known species, and 10,000 species of animals, in fact, the number of animal species on the earth is far more than these, because many animals are tiny and must be seen with a microscope, and some animals live in inaccessible places, such as in dense primeval forests, or deep seabed or trenches in the ocean. Therefore, there are still many animals in the world that have not been studied in detail, and scientists estimate that there are more than 10 million species of animals that have not yet been discovered and studied by humans, which shows how rich and diverse the animal world is.

The number of insect species described is now more than 780,000, accounting for three-quarters to four-fifths of known animal species. Even in countries where insects have been studied in detail, new species are constantly being discovered, and it is estimated that more than 10,000 new species are recorded each year worldwide. As a result, it has been estimated that there may be about 2 million species of insects that inhabit the planet.

Due to the large number of insect species, it is the largest class in the animal kingdom. With 330,000 species in Coleoptera alone, it is the largest order of insects, of which there are 60,000 species in the weevilidae alone, followed by the leaf beetle.

Moreover, the number of individuals of each insect is also very large, and we are accustomed to seeing mosquito swarms on the banks of ponds, swarms of mayflies, and the large number of pests in the fields. The largest number of flying insects are locusts, such as the desert locusts in Africa or South-West Asia, which tend to cover an area of 500 to 1,200 hectares, number between 7 and 2 billion individuals, and weigh between 1,250 and 3,000 tons. There have even been estimates of locust swarms with a total weight of about 50,000 tons.

So the total number of individual insects is something we can't think about.

The reason why there are so many insects is mainly due to their special reproductive ability. It is not uncommon for a female to lay more than 100 eggs, some as many as 1,000. The number of eggs laid by social insects is much larger.

The largest number of termites in Africa (subfamily Macrotermites) lay more than 15,000 eggs a day and continue for several years with little interruption.

Red wolves, a species of wolf that only lives in North America, are found in the forests and swamps of the eastern United States, once found in half of the United States.

Gibbons, known for their slender arms, are also national second-class protected animals, standing upright and no more than 1 meter tall with short legs, so their hands are very long, but very fast.

Horned whales, if not counting the horns, can generally reach about four or five meters in length, have no dorsal fin, and as they age, there will be a lot of white patches on the abdomen.

The Sumatra rhino, a solitary creature that lives through to the end, is only during the breeding period and when raising babies.

There are about 1.5 million known species of animals on Earth.

Animals can be divided into two categories: vertebrates and invertebrates, vertebrates have a vertebral column composed of many vertebrae on the back of the body, and the individual is generally larger; Invertebrates have no vertebral columns, and most of them are small, but they are diverse, accounting for more than 90 of the entire animal population. For example, insects such as flies, mosquitoes, grasshoppers, butterflies, etc., are invertebrates.

Vertebrates can be divided into five major groups: fish, amphibians, reptiles, birds and mammals. Fish are the largest group of vertebrates, with a total of 25,000 to 30,000 species including marine fish and freshwater fish, such as carp and yellow croaker. There are more than 2,000 species of amphibians, such as frogs.

There are more than 3,000 species of reptiles, such as snakes, turtles, crocodiles, etc. There are 9,000 species of birds, such as pigeons, sparrows. There are more than 4,500 species of mammals, such as horses, cows, lions, tigers, etc.

There are still many species of animals in the world that have not yet been discovered.

Difference Between Animal and Plant

The difference between plants and animals is that they have different morphologies, different reproductions, and different metabolisms. Plants are generally made up of roots, stems, leaves, flowers, and fruits, and the simplest plants have only one cell. Animals have a head, neck, limbs, trunk and tail, and are higher animals.

In general, plant reproduction is based on seeds, spores, and nutrients. Animals, on the other hand, reproduce through reproduction, ovoviviparous, viviparous lactation, etc.

According to zoologists, there are about 1.5 million known species of animals on Earth.