I

Isis0

    Exposure to songs then shapes these neural circuits.
    0:39
    There must be something fixed in the learning process.
    0:42
    This is the song of a brown threshing machine.
    0:40
    So how do birds learn these songs?
    0:33
    Most birds make short, simple calls.
    0:27
    After all this fighting and eating and flying.
    0:39
    Of course, flying this way can be exhausting.
    0:48
    As generalists, pigeons use urban food waste.
    0:40