Something odd happened during that time: Domesticated
finches started singing an extreme and evolving variety of songs, quite unlike the wild munia, which has only a limited number of calls.
For example, female
finches started singing.
Not exact matches
Young birds without the HVC continued to babble (compare audio of a normal young
finch and a babbling youngster with HVC missing), while slightly older
finches who had
started to learn how to
sing took a step backwards.
Get a good night's sleep so you'll remember yesterday's French class — or maybe
start singing like a zebra
finch..