Researchers find babbling by zebra finch chicks is important step to memorizing songs
Phys.org -

When babies learn to talk or birds learn to sing, the same principle applies: listen and then imitate. This is how the first babble becomes the first word or vocalization. Male zebra finch chicks initially memorize the song of an adult bird. Later, they refine their own vocalization until they resemble the learned song.

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