Are any animals not sleeping well?

The lives of migratory birds are hard. During the long ten thousand kilometers of relentless migration, did they sleep? Probably didn't sleep, they couldn't fly that far.

Do any animals sleep? - (Photo: Animalnewyork)

But also need to agree what sleep is. It is a process of physical activities, the external stimuli are weak. In the bio-sleep, each person has a posture, but lies mostly, while the bat hangs upside down on the tree; Horse, deer, elephant sleeping stand. Sleeping posture must be so easy to operate again. Compared to hibernation and coma, the sleep mechanism is different.

Most animals sleep but their sleeping patterns are different. The giraffes hardly slept, because they fell into a state of short but very deep unconscious every day, lasting for about 30 minutes. On the contrary, the brown bats are tired of 20 hours a day. Most mammals in their youth sleep more when they are adults. The killer whale and the bottle-shaped dolphin are the exception, the 'kids' in the first months do not sleep at all.

Some species change their sleeping habits when there are special activities. For example, during the migration season, the bird's sleep time is shortened and then there is no compensatory sleep. There are birds that only take a few seconds of sleep and sometimes they maintain the mechanism of 'half-hemisphere sleep', and half still have to stay alert to possible dangers. Some mammals also apply this mechanism of sleep such as whales and dolphins.

Electrocardiography to see brain activity rarely finds the activity of invertebrate brain waves and other information about their brains. To define sleep, people often focus on behavioral leads, such as physical activity, typical posture, cycle of the day and response when stimulated. It has not been determined whether fish and amphibians are sleeping, which signs they are at rest. On the other hand, how insects sleep is still an untapped land.