Young birds learning to sing actually practice until they get the songs right.

        Scientists analyzed vocalizations of juvenile zebra finches and compared them to those the birds made after listening to recordings of singing from an adult male zebra finch, played by a plastic model of an adult bird. The original songs were off-key and monosyllabic, but as the young birds sang, they'd vary their pitch as they tried to match the adult bird recording.

        Eventually, they were able to reproduce separate sounds learned from the adult bird recording on their own, rather than just copying them.

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