How many reptiles are there in the world?

There are about 6,700 species of reptiles in 5 orders in the world. There are more than 360 species of reptiles in China, belonging to 107 genera and 23 families of 3 orders.

Reptiles, vertebrates, or reptiles, reptiles, amniotic animals belonging to the quadruped class, are the general name for all species of sauropids and zygomorphs except birds and mammals, including turtles, snakes, lizards, crocodiles, extinct dinosaurs and mammal-like reptiles, etc.

In the traditional Linnaean classification system, reptiles are classified as a class, and the name is reptilia. However, the classification does not include the surviving descendants of dinosaurs and mammal-like reptiles, birds and mammals, making them paraphyletic. According to the taxonomy of kinship branches, the monophyletic group of modern reptiles combined with birds is classified as sauromorphs, which in turn form a monophyletic group of amniotic with the hetocks.

The extant reptiles are divided into 5 orders: crocodiles, such as Chinese alligators, caimans, Ganges crocodiles and bay crocodiles; turtles and turtles, such as sea turtles, tortoises and soft-shelled turtles; lizards, such as lizards, geckos, and monitor lizards; snakes, such as pythons, red-chain snakes, cobras, and rattlesnakes; The only remaining animal of this order is the wedge-toothed lizard (also known as the beak-headed lizard, which resembles a lizard and has a bird's beak at the front end of the adult head. It has two rows of teeth in the upper jaw and one row in the lower jaw.

The most special thing is that it has a third eye, the parietal eye, on its forehead. Some lizards and frogs also have a third eye, but they are too small to be noticed).

There are four major categories of reptiles, namely: snakes, turtles, crocodiles, and lizards.

Well, all kinds of snakes, such as pit vipers, cobras, bamboo-leaf green snakes, king cobras, vipers, rattlesnakes, sea snakes... It's all snakes.

Turtles, grass turtles, golden turtles, Brazilian turtles, sea turtles, hawksbill turtles, soft-shelled turtles, snapping turtles... They are all turtles and turtles.

Chinese alligator, Nile crocodile, Gulf crocodile, Siamese crocodile, American alligator, Mississippi crocodile, caiman... It's all crocodiles.

Snake lizards, crocodile lizards, sand lizards, skinks, geckos, iguanas, flying lizards, chameleons, monitor lizards... They are all lizards.

These are all reptiles.

Reptiles are: crocodile, maned lion lizard, chameleon, Australian magic lizard, Mexican poisonous lizard, Komodo dragon, sea iguana, gecko, snake, wide tortoiseshell.

Crocodile: The average body length of the existing large species crocodile is more than 4 meters, the weight is about 300kg, the largest living crocodile is nearly 7 meters long and weighs nearly tons, and the largest scientific expedition (live capture) record is meters, weighing 1075kg Luolong. The jaws are strong and powerful, with many conical teeth, short legs, claws, and webbed between the toes.

The tail is long and heavy, and the skin is thick with scales.

Maned Lizard: Maned Lion Lizard (Latin scientific name: Pogona vitticeps, alias:

Central maned lizard), a lion of the family Lizardae, is not a CITES species of the Washington Convention. It is about 45 centimeters long and up to 55 centimeters in length, and has a large body with spinous scales located on the side of the body, all of which grow in different directions. It is semi-arboreal and feeds mainly on insects and plants, mainly in the eastern half of Australia.

There are 3 main differences between amphibians and reptiles:

1. Different classifications: amphibians belong to the amphibians, while reptiles belong to the reptiles.

2. Different living environments: amphibian larvae grow in water, and adults can grow in water or on land. Whereas, the majority of adult reptiles live on land, and a few live in water.

3. Different breathing methods: amphibian larvae breathe with gills, and adults breathe with lungs and **. Whereas reptiles breathe with their lungs.

The smallest reptile in the world is a miniature chameleon.

The tiny size of the miniature chameleon suggests that the chameleon's introductory cavitation on the island of Madagascar may have been a smaller, inconspicuous ancestor, quite different from the larger, brightly colored chameleons that are commonly seen today.

Two adult miniature chameleons, one female and one male, have been found in northern Madagascar. The male is only 22 mm long, making him the smallest known reptile at present. The other female chameleon is slightly larger, but only 29 mm in length.

However, the new species is a cause for concern, as the chameleon's habitat has been destroyed by deforestation, but in recent years it has been fortunate that they have survived with the planning of local reserves.

Introduction of the chameleon

Chameleons are animals of the genus Avoidance in the family Avoidance. Its skin color changes depending on the background, temperature, and mood, and it is capable of evading predators and conveying emotions, similar to human language. Every 2-3 toes are combined into two groups of toes, terminal teeth, the tongue is slender and extendable, the body is long and cylindrical, the sides are flattened, the head is round and triangular, the tail is often curled, the eyes are convex, and can rotate independently, mainly distributed in Africa, and a few are distributed in Asia and southern Europe.

Some species of chameleons have helmet-shaped heads, while others have conspicuous headdresses such as three long horns protruding from the front, and males are more prominent, possibly used to defend their occupancy. If there are other males, the dominant male's body is stretched, the throat is bulging, the head ornament stands up or shakes, and if it still can't scare the other person, he rushes over and bites his palate.