Animals sleep standing and have a common reason, do you know?
We all know that animals must need to sleep. Only with enough sleep can the energy consumed be replenished. But every time we go to the aquarium, we hardly see penguins lying down and sleeping and resting. So why is this?
About Can penguins sleep? How to sleep? Related questions? ❓I believe many friends are not very clear about this. In order to help you understand the relevant knowledge points, I have compiled the following explanation for you. I hope the following content will be helpful to you!
First of all, I want to tell you: Penguins can sleep, but they usually sleep on their feet. The reason why penguins sleep on their feet is because they develop the habit of sleeping while avoiding the pursuit of carnivorous animals in a long-term harsh natural environment. It is precisely because there are many carnivorous animals that they will sleep on their feet to facilitate escape. For them, taking a standing sleeping position can greatly improve the possibility of survival. Therefore, in order to survive and to escape better, they must sleep on their feet, but sometimes in a relatively safe state, they will also sleep on their feet.
There are also younger penguins who will lie down or sleep on their tummy. At this time, they are not completely independent and have limited awareness of danger.
In addition, penguins usually gather together to sleep. When they sleep most of the time, several penguins are awake and alert to the surroundings. These penguins play the role of "sentinel". When they find danger, they will make a sound to wake up their companions, and then they will migrate to other places and continue to sleep.
In addition, there are 18 independent species in total, most of which are distributed and live in the southern hemisphere, characterized by being unable to fly, and penguins cannot fly is the result of natural evolution. In the early days, penguins' ancestors also had flight skills, but their diving energy consumption is far lower than flying. As they evolve, penguins become unable to fly.
The penguin's feet are born at the bottom of the body, so they are in an upright position. Generally, the legs and knees of penguin are hidden in its belly, while the penguin's forelimbs are fin-shaped and webbed between their fingers.
The body surface of the penguin is covered with dense short feathers to reduce friction and turbulence. A layer of air remains between the feathers, which is used to insulate heat. With a black back and a white belly, penguins are often called a "feathered fish".
Penguins are called "feathered fish", which is mainly attributed to the penguins' free swimming posture and rapid swimming speed underwater. Although penguins are quite different from whales, their speed underwater is comparable.
The penguin's swimming speed is largely determined by the characteristics of its body. By understanding the appearance of penguins, we will find that penguins' feathers are scale-shaped and their feather covers are continuous and uninterrupted, which is very similar to the fish pilos. In addition, the penguin has heavier bones and more prominent dragon bones. Such bones are concentrated and powerful, easy to control the body and control direction and speed, and are extremely conducive to penguins swimming in the water.
