What color do crocodiles fear most?

Because crocodiles are color blind, but only yellow is very sensitive. Yellow is a medium-wave electromagnetic wave, which is very easy to cause irritation to crocodiles, which are sensitive and cold-blooded animals. Staring at yellow for a long time will also lead to faster digestion of crocodiles, which will damage their kidneys this time, so crocodiles will take the initiative to avoid yellow objects.

In fact, many amphibians, along with fish in the sea, are color blind. Although their eyes can see, they can't distinguish colors. Not only crocodiles, but many animals don't like yellow. Crocodiles are one of the oldest species found on the earth, and there are currently 23 species of crocodiles in the world.

Although crocodiles are very fertile, they have become endangered species for various reasons. Crocodiles, as an advanced reptile, rely on their lungs to breathe. The crocodile's heart is divided into four chambers. Crocodiles' eyes are different from those of many animals. They grow on the top of their heads. They really use their eyes higher than the top. And there is a film on their eyes, which can protect crocodiles from seeing things normally when they are in the water. This is also for the convenience of crocodiles lurking in the water, with their eyes on their heads and their bodies completely submerged.

Not only that, the crocodile's nostril is also at the top, and there is a door-like valve in the nostril. When the crocodile enters the water, the valve in its nostril will automatically close, thus preventing water from entering the crocodile's nostril. And the crocodile's tail has grown into the overlord. Crocodiles have strong tails, which can not only help them swim, but also attack their prey. Among crocodiles, the largest grows in the bay crocodile, which can grow to four or five meters long, and the smallest is the Chinese alligator, which is usually only about one meter.