Are bats really invisible, and can bats see things at night?

A bat's eye can see things.

Bats use waves to determine whether there is an obstacle in front of them, and use this to change their flight path. However, bats do not have poor eyesight, different species of bats have different vision, and bats use ultrasound, which is not necessarily related to their vision. So bats can still see.

Bats emit ultrasound waves in the form of pulses, echolocated by a series of short pulses of high frequency. These pulses come from the mouth or nose and are classified as frequency modulation (FM), constant frequency (CF) sounds, and less strict constant frequency sounds, also known as quasi-constant frequency (QCF). Echolocation is a complex, highly evolved process that is the analysis of an animal's own emitted sound waves' echoes to build sound-images of its surroundings.

The lights cannot be turned off, and the bats have ultrasound waves to avoid obstacles.

If they come out during the day, they will be dried by the sun, and bats are good at flying at night because they can rely on their sense of hearing to discern direction. When bats fly, they are able to produce ultrasound waves in their throats, which are emitted through their mouths. When ultrasound waves are reflected back when they encounter an insect or obstacle, bats are able to pick them up with their ears and can tell whether the target is an insect or an obstacle, and how far away it is.

This method of detecting targets is called "echolocation".

Bats can catch an insect in a matter of seconds and a dozen in a minute. Some bats feed on fruits, while many feed on insects.

vampire bats feed on the blood of animals. No matter how much it flies at night, the bat will never collide with anything, and even a very thin wire will be deftly avoided.

In traditional Chinese culture, bats are a symbol of good luck and happiness. We often say that the "five blessings (bats) are coming to the door", and its pattern is composed of five bats, and these "five blessings" represent five auspicious blessings: Shoubi Nanshan, Wishing you prosperity, health and tranquility, noble morality, and good beginnings and good ends.

At the same time, bats are a great matchmaker, and if they don't spread pollen, we will lose 70% of our sweet and delicious fruits, including your favorite peaches and bananas. And, bats are the most sensitive animal ......

Bats do not come out during the day.

Bats have strong flight capabilities and are also natural hosts to a variety of zoonotic viruses, capable of carrying dozens of viruses. Adapted to their ability to fly and live a nocturnal life, bats have also undergone a series of important changes in their physiology.

Usually bats have poor vision, but their hearing is unusually developed, and they are able to fly freely and catch food with unmistakable accuracy at night or in very dim environments.

Bats have light bones all over their bodies. The skull is highly healed, the bone sutures are not obvious, and many species have nasal recesses (sinuses) with varying degrees of development at the front end of the nasal bone, and often have varying degrees of palatal recesses (palatal sinuses) at the front end of the ventral palatal bone. The shoulder girdle is well developed, the sternum.

It has keel-like protrusions. Hind limbs tibia, fibula.

Degenerate. <>

The wings of bats present two typical types, reflecting two different proportions, namely the ratio of wingspan and wingbread. Some species, such as the giant chrysanthemum bat (at point A), have a smaller proportion and are adapted to fly at low speeds and delicately among leaves, while others, such as the Mexican wrinkle-lipped bat (at b), have a larger proportion and can fly at high speeds without obstacles.

A bat's eyes can see things.

The eyes of bats can see things, although bats use waves to judge whether there is an obstacle in front of them, and use this to change the flight path, but the eyesight of bats is not bad, different species of bats have different vision, and bats use ultrasound, which is not necessarily related to their vision.

Bats are the only beasts that can really fly, although they do not have the feathers and wings like birds, and their flying skills are much worse than birds, but their forelimbs are very developed, the upper arms, forearms, metacarpal bones, and phalanges are particularly long, and by its thin and hairy, from the end of the phalanges to the humerus, body side, hind limbs and between the tail of the soft and tough epiderma, forming the bat's unique flight organ - wing hands.

The environment in which bats grow

Bats live in all kinds of large and small caves, crevices of ancient buildings, ceilings, partition walls, tree holes, rock crevices on the mountain, and some southern fruit-eating bats also hide behind the leaves of palm and plantain trees. Some bats have populations of thousands of individuals, some live together with males and females, and some live separately from males and females.

Many of the wood-dwelling bats migrate to warmer regions during the winter, sometimes flying thousands of miles. Cave-dwelling bats in temperate zones generally hibernate. Bats breed only once a year, and in the earlier warm seasons, bats give birth to pups.

This is the basic structure of animals, there must be eyes to see things, mouth to eat, ears to listen to sound and survive, but the role of bat glasses is not very large, because bats rely on sound to identify the direction, but in the long-term evolution process did not evolve the eyes, so existence is reasonable.

Because some bats have very good vision, ultrasound positioning replaces part of the function of the eyes, so bats can still hunt, but they need to use their eyes to perceive light and distinguish between day and night.

Bats are generally nocturnal and rely on the ultrasonic reflections they produce to avoid obstacles, which may be the result of the evolution of bats over a long period of time, although the eyes are invisible, but not yet when the eyes have degenerated.

Can't bats see? So why have long eyes? You'll know after reading it.