大多数动物的耳朵都由内耳、中耳和外耳组成。但由于动物的生活环境各不相同,它们的耳朵也有着千差万别的特殊性。鸟类的耳朵乍看上去,鸟类似乎没有外耳,其实还是有的。不过,它们的耳轮不是皮包软骨,而是由长在耳道外缘的一圈独特毛簇、皮肤褶皱和瓣膜组成的。 Most animal ears consist of the inner ear, middle ear, and outer ear. However, due to the different living environments of animals, their ears also have vastly different particularities. At first glance, the birds’ ears do not seem to have outer ears. In fact, there are still some. However, their helix is ​​not a cartilaginous cartilage but consists of a unique collection of tufts, skin folds, and valves that grow on the periphery of the ear canal.