All wild birds of the same species sing the same song. how do the birds learn their species song answers

They do it by learning when they are young. Experiments have shown that isolating young birds from when they hatch to adult, they fail to learn their song. These studies, however, have shown that young birds have an innate capacity to discriminate their species-specific songs from a mixture of bird songs.  

Birds learn the responses of species songs through imprinting.

Explanation:

Imprinting can be synthetically defined as a peculiar form of learning to condition various aspects of social life, including sexual life. In pups that were raised by their parents, a regular imprinting is installed that allows the identification of the species to which they belong, to acquire the behavioral modules of the species, such as learning the responses of the species songs.

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