Crocodiles are vertebrate reptiles.

The crocodile is a carnivorous oviparous vertebrate reptile, the oldest reptile contemporaneous with the dinosaurs more than 200 million years ago, and one of the most primitive animals that have survived to date.

The crocodile survives and reproduces due to its strong vitality, making it one of the oldest living fossils on earth. The crocodile belongs to the endangered wildlife protection animals, which are classified as endangered wild animals and plants by the international class I protection.

Extended information:

Crocodiles are usually found in the wet areas of lakes and swamps, or in the grasses in the mountain streams. Crocodiles often give the false impression of being slow. Others describe the crocodile marching, not to crawl forward with the body to the ground, but staggering and lurching, four feet stretched out, the body floating, the tail dragged on the ground.

In fact, this description is a kind of crocodile illusion. In fact, the crocodile's sense of hearing and vision are extremely sensitive, and all segments of its body are flexible in their movements. The crocodile is also a relatively intelligent animal. For example, the crocodile's method of predation is very peculiar.

Whenever it swims in the water, it suddenly finds a small animal, it is not eager to catch it immediately, but it will first hide its body to the bottom of the water, and then quietly swim towards the direction of the small animal, firstly staring at each other motionlessly, and then suddenly jump up to catch the small animal, and then finally carry it to the river with its mouth.