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Does everyone know why animals need moving ears?
The auricle is part of the outer ear, consisting of cartilaginous tissue. Its function is to catch sounds and direct them to the eardrum. In humans, unlike animals, the muscles atrophied, which drove this part of the ear into motion. And why do animals need moving ears? To understand this, you need to know how their hearing organ is arranged and what is its role in their life.
What does hearing for animals mean
How are the ear auricles
Probably everyone watched dogs alert their ears, and horses lead them to hear better. This is explained by the importance for the animals of the auricle. The external auditory meatus of them is a very important organ for catching a wide variety of sounds. Therefore, it was built mainly in the form of a funnel. Thus, it is easier for an animal to catch sounds that are heard from different directions.
The external ear of animals has a very complex structure: there are several auditory passages leading to the eardrum, as well as special hillocks that catch the direction of sound. Why do animals need moving ears? Their ear is like a locator, it catches sound waves. And to better recognize them, the ears of many mammals are large, have a conical shape or a funnel shape. This is all necessary in order to better recognize the sounds and their source.
Why animals have big ears
1. Sound is a wave, its receiver is the tympanic membrane. But in most animals they are small, this is done in order to avoid their damage. Therefore, the sound wave must be caught and amplified, because the sound must be strong enough to cause oscillations of the tympanic membrane. And big ears can catch the most inconspicuous sounds and amplify them many times.
2. The large size of the auricles in many animals serves also to be able to rotate them 180 degrees. This, for example, needs a hare to feel the danger from behind, without turning his head. This animal is the clearest example of why animals need moving ears.
3. Some nocturnal animals also have large ears, for example, bats. Such ears help them navigate in the dark. They emit supersonic waves and with large ears, as locators, catch them after reflection from various obstacles.
4. Another function of large ears in animals is thermoregulation. Note that all animals living in the desert, even hedgehogs, have large ears. And they serve more for cooling than for catching sounds. This is seen in the example of an elephant. His big ears are very mobile, but the rumor of this animal is not very sharp. The elephant slaps his ears to cool and drive off the annoying insects.
Why do animals need moving ears
To understand this, you need to imagine the life of a predator, especially a herbivore, in the forest.
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