Reptiles are a group of animals with a common feature: cold-blooded, air-breathing bodies. They include snakes, lizards, turtles, tortoises, crocodiles, and alligators. Reptiles lay eggs to help them survive in the wild, and as adults, reptiles have scales to protect them from the elements.

Four major groups of reptiles

Reptiles are animals with skin that is water-resistant, scale-like, or both. Reptiles include turtles, lizards, and snakes. These animals are not to be confused with amphibians. Reptiles evolved from amphibians about 300 million years ago and differ in their bodily systems.

Reptiles have a variety of reproductive techniques. Many species lay eggs in nests. In most cases, the young of these creatures are born mated, and the mother provides care for the young. Reptiles also have highly developed lungs that allow them to breathe without an air sac.

Reptiles do not have a second palate, so their respiratory systems are not as sophisticated as those of mammals. Their kidneys are small and have a slow metabolism, which means they can survive for months without a meal. However, some species are herbivorous, and their earbones are so small that they must swallow rocks to break up plant matter.

Reptiles are classified as paraphyletic, but their classification can be made monophyletic by adding birds. The earliest known proto-reptile was a lizard-like animal called Hylonomus. The largest reptile lineages, however, diverged at the end of the Permian period. While there are many diverse reptile groups in the world, many have gone extinct. Some of them died due to mass extinction events.


In order to survive, ectotherms need to conserve heat. Reptiles that dive conserve heat by stretching out their skin, and amphibians cool off by moving into water. The ectotherms’ ability to conserve heat helps them survive in cold climates where food is scarce.

Most ectotherms go into torpor during the cold months, which is a form of short-term hibernation. Depending on the species, torpor can last for a season or even years. While in torpor, the metabolic rate of ectotherms drops to about one to two percent of its resting rate.

Ectothermism affects all aspects of reptile and amphibian biology. It is especially important in periods when energy from the sun is scarce. It is a vital component of a reptile’s survival and reproduction. While this characteristic might not be a strong determinant of longevity, it may play an important role in determining the lifespan of an individual.

Some reptiles are endothermic, but crocodiles are an exception. Although the reptiles are not strictly endothermic, they exhibit all of the elements of endothermy. Crocodilians, for example, have feathers. This may indicate that their ancestors were endothermic.


A reptile’s diet can vary widely depending on the species, habitat, and life stage. Some are carnivorous while others are insectivores. During their juvenile years, some lizards are mostly carnivorous while others, such as iguanas and bearded dragons, require an entirely different diet that includes more plant-based foods. Proper nutrition for reptiles is therefore crucial for a happy, healthy pet.

Vitamins are vital to reptile health, particularly vitamin D3. Insufficient amounts of vitamin D3 can interfere with the absorption of calcium from the gastrointestinal tract. A reptile without 파충류샵 adequate vitamin D3 may suffer from secondary hyperparathyroidism, which leads to rickets. Supplements are available that include vitamins D3, K, and amino acids.

Reptile intestines are relatively short compared to those of mammals, and their digestive tracts are less dense. In addition, reptiles’ metabolism is lower than mammals, which may reduce pressure on the digestive tract. Reptiles also rely less on their ability to move and maneuver, which helps them eat less than mammals.


Reptile reproduction involves two distinct stages: oviposition and egg laying. The former involves the sperm swimming up into the female cloaca, while the latter involves the egg being released into an opening in the ovary. Both of these stages involve development, with the egg yolk supplying nutrition to the growing embryo. The subsequent stages of the reproduction process provide an opportunity to observe the process from several angles.

Reproduction in reptiles is highly complex, with several factors controlling the process. The amount of daylight, temperature, humidity, enclosure design, and diet all have an effect on reproduction. Many species are oviparous, viviparous, or ovoviviparous, and some have even evolved parthenogenesis. However, in most species, the egg is deposited into the oviduct just before the sperm is released.

Reptile reproduction differs from that of dogs, cats, and birds. It is more complicated than in mammals and dogs because the physiology of reproduction is more complex. Reptiles are also not sexually dimorphic, which makes identifying their sex difficult. Male snakes, for instance, have a longer tail, while female snakes will have a shorter tail.