Crocodiles belong to the phylum Chordata, Reptilia, so they are vertebrates, but also reptiles. As a reptile, crocodiles meet some key characteristics of reptiles. For example, reptiles move by crawling, crawling on the ground, and crocodiles also use crawling methods. They can not only crawl on land, but also move in the water, they can swim. For example, reptiles are mostly oviparous animals, and crocodiles also use oviparous methods, female and male crocodiles will mate in the water, and then female crocodiles will go to the shore to lay eggs, laying eggs in their own dug pits.
Also, from the point of view of body temperature, reptiles generally belong to poikilotherms, and body temperature cannot be constant all the time. The same is true of crocodiles, which are also poikilotherms. From the appearance characteristics, reptiles generally have some scales or horny plates on their bodies. The same is true of crocodiles, whose body surface has more obvious scales, which can be used to protect their bodies. It can be seen that crocodiles, as reptiles, conform to many characteristics of reptiles.
As mentioned above, the crocodile belongs to a reptile in the class Reptilia. Amphibians and reptiles are two different animals, they are different classes, so crocodiles belonging to reptiles can no longer belong to amphibians. There are some differences between crocodiles and amphibians, such as the different classes mentioned above, which belong to Reptilia and Amphibia respectively. In addition, from the point of view of breathing mode, amphibian larvae generally breathe with gills, while adults breathe with lungs or skin; But crocodiles are reptiles and breathe with lungs all the time.
