Hello, accurately speaking, many animals have no hearing, and communicate and feel by vibration, sound waves and ultrasonic waves.

I have some information for you. Take a good look and learn more about how the animal world perceives the world in their unique way.

Animals' hearing is far less mysterious than their vision. Higher animals have developed hearing. Among mammals, animals with big ears, such as deer, rabbits and foxes, can hear extremely slight sounds that human ears can't hear, and may even include infrasound. Bats and dolphins can communicate with each other or explore their surroundings with ultrasound. Of course, they can hear sounds that these people's ears can't perceive. We have reason to believe that our world must be much quieter than many birds and animals can hear. Put bats' ears in a quiet room, and they will hit the wall everywhere, indicating that they can navigate by sounds we can't hear; In the past, people were puzzled by the behavior of elephants sending messages to their companions several kilometers away. Later, the mystery was solved: they can send and receive infrasound waves that we can't hear, and make long-distance contact in obscurity! In the age when science was still immature, the ancients could only explain this phenomenon with various legends.

For some people, animals without ears, or rather, animals without outer ears, have good hearing, which is often confusing. Everyone knows that birds have good hearing, but when it comes to birds' ears, it will certainly make many people feel strange, but their hearing is outstanding: according to the general law, species that are good at singing must have corresponding hearing, otherwise, it is meaningless to contact their companions through singing. Birds can not only hear sounds, but also hear sounds like other animals: woodpeckers can hear the sounds of longicorn larvae moving in trees, while owls can catch mice in the dark according to their calls or walking sounds. Some owls can also catch hidden mice from snowdrifts by auditory localization. People who don't know think their eyesight has X-ray penetration! Owl is one of the few animal species with asymmetric ear canal, which makes the incoming time of sound slightly different, making it easier to determine the specific location of sound. We can see that they turn their heads strangely before attacking, in order to collect sounds from different angles.

Among the animals that people often come into contact with, it is quite rare to have no hearing. According to people's general logic, at least there should be an organ on the head that can collect sounds-the ear, in order to produce hearing, but we can't find such an organ in some snakes, fish and insects. They do have hearing. What's going on here? It turns out that their ears don't grow on their heads. For example, male crickets and crickets attract female insects by singing. They must have hearing. Although their heads have no organs that sense sounds, they derive structures with auditory functions at the ends of their forelimbs. Many fish have a lateral line in the middle of their bodies, which is a series of "tunnels" on the scales. Among them, it has the function of inducing vibration. When the sound from the shore spreads to the surface of the water, and then the water vibrates through the conduction of the water, the fish nearby can feel it and respond, so it can be said that they hear the sound. Although they may not be able to distinguish the meaning of sound, they can hear the "silent sound"-the vibration of water, including the fluctuations caused by nearby animals passing by; Many books say that cobra is deaf and can't hear any sound. The flute played by those Indian snake charmers is purely a gimmick. They let the snake feel it by tapping the ground with their feet. Is this really scientific? Physically, sound is defined as the sound produced by vibration propagating in air (or other media), and hearing is the perceptual response to this vibration. In that case, will cobra hear when it feels vibration? If they can feel the vibration of the air disturbed by the sound of the flute and react to it, do they hear the sound of the flute? I think it should count. North American rattlesnakes have horny tail joints and can make a rustling sound. If they have such vocal organs but have no hearing, it is incredible: how can they influence their behavior with functions they can't feel? Anatomically speaking, rattlesnakes and cobras have no substantial performance in auditory organs. Perhaps, the scales in their stomachs are very different "ears" like the lateral lines of fish?

Humans have long known how to use sound to trap prey. The earliest motivation for ancestors to make bone flutes was probably whistling to attract prey and let them trap themselves. Curious archaeologists can still successfully attract stags by playing bone flutes excavated thousands of years ago in the modern field environment, which is amazing. The ability of animals to distinguish sounds may not be as accurate as other senses, which may be a weak link in wildlife behavior. Of course, in addition to humans, some predators have also learned this trick. For example, the rustling of rattlesnakes is very attractive to thirsty animals in arid desert areas. Shrike birds hide in dense trees to imitate the songs of birds, and it is also easy for birds who come to look for companions to be attracted.