Why do owls sleep during the day but not at night? What is the state of an owl's eyes when it sleeps?

We all know that owls have very special eyes, which are different from other animals, including their living habits. Owls usually live in trees, rocks or grass. They are nocturnal animals. They usually hide during the day and come out to hunt at night. Why do owls sleep during the day but not at night? Let's explore it together!

Contents of this article

1. Why do owls sleep during the day but not at night?

2. What is the state of an owl's eyes when it sleeps?

3. How do bats sleep?

Why do owls sleep during the day and not at night?

Owls are nocturnal birds. They choose to sleep during the day because their eyes have very good light sensitivity. The daytime environment is too dazzling for them and not conducive to activities, so owls use the daytime to rest and recuperate, and then come out to move around at night.

Owls have sharp vision, and in the dark night, their visibility is more than 100 times higher than that of humans. At the same time, owls also have very strong hearing. Even if there are some creatures that they cannot see in the dark, they can judge the direction of the other party by listening.

Owls have very soft feathers and their wing feathers are covered with dense velvety down, so the frequency of the sound waves produced by an owl when flying is less than 1 kHz, and the ears of ordinary mammals cannot sense such low frequencies.

Owls have flexible cervical vertebrae that can rotate 270 degrees. In addition, there are three eyelids in their eyes. The upper eyelid is lowered when blinking, the lower eyelid is covered when sleeping, and the middle eyelid is a linear tissue that moves up and down the eye surface to clean the eye surface.

What is the state of an owl's eyes when it sleeps?

When an owl sleeps, one eye is usually open and the other is closed. Owls usually sleep during the day and hunt at night, and they remain highly alert even when they are sleeping. Owls are carnivorous animals, mainly eating rodents, but they also eat some insects, birds, lizards, fish and other animals.

Owls usually live on trees, rocks or grass. They are nocturnal animals. They usually hide during the day and come out to hunt at night.

Owls are distributed all over the world except the Antarctic region. Their feathers are mostly brown with fine spots on them, and they make no sound when flying.

How do bats sleep?

Bats sleep upside down. Bats choose to rest in high places so that they can avoid predators and take off quickly. In addition, bats' skin is very sensitive. When they hang upside down, except for the toes holding onto something, there is air all around, so there is no need to worry about hard objects scratching their wings.

Bats' hind limbs are very small, so they cannot walk and can only crawl on their front limbs, which makes them slow and clumsy.

If bats encounter danger while sleeping, they cannot take off directly like birds. They have to glide at a high altitude before they can fly. Therefore, sleeping upside down will make bats safer.