The average male has some 180 tunes in his repertoire.

平均雄鸟会180首曲目。

But for male birds, music is actually part of a testosterone-fueled mating ritual.

但是对于雄鸟而言，歌声实际上是由雄性激素引发交配仪式一部分内容。

A second male arrives and takes centre stage.

第二雄鸟飞来并且占取中心舞台。

They have also placed skilled male singers next to young learners.

他们还把唱功好雄鸟放在幼鸟旁边。

But in birds, it usually only takes place when females are not around males.

但在鸟类中，有当雌鸟不在雄鸟身边时候，才会发生无性繁殖。

The male displays another feature—an extendable wattle.

雄鸟还展示另一特征——延长囊肉。

Male birds also have strange ornamentation on their skull.

雄鸟头上也有奇异装饰。

On the other hand, putting all of one's eggs in a single basket is a risky proposition, so it also makes sense for males to try and slip some of their genetic material into a few other nests if they can.

另一方面，把所有都放在一个篮子里是一个风险很大命题，所以，如果以话，雄鸟尽量把自己一些遗传物质溜到其他几个窝里去，也是有意义。

The male birds wear their bright bold feathers to show the females how strong and healthy they are, so the females know they would make a good father.

雄鸟过明亮醒目羽毛向雌鸟展示它们强壮与健康，这样雌鸟就会知道它们能成为一名好父亲。

And in the end one female became desperate enough and mated with the isolate founder, and then we had baby birds that imitated their father.

最终，有一雌鸟绝望了，和那雄鸟结合了，然后它们有了孩子，孩子开始模仿父亲。

Mini-er males aren't uncommon in birds because lady birds have to produce eggs, and that takes a lot out of them, literally.

雄鸟体型偏小在鸟类中并不罕见，因为雌鸟必须产，这确实会消耗掉很多。

" The males have dropped one of the notes, so instead of having three syllables repeating, it's actually two syllables repeating."

“雄鸟漏掉了其中一个音符，因此歌曲结尾不是三个音节重复，而是两个音节重复。”

Displays can involve several males displaying together in an arena; they call out and display their feathers.

这种表演能会包括几雄鸟在一个竞技场上一同展示；它们会发出叫声并炫耀它们羽毛。

This is not a female but a young male who hasn't yet developed that head crest.

这不是雌鸟，而是一还没有长出羽冠雄鸟。

For birds, pairing up is a good strategy because their young require a ton of care, so males increase their chances of successful reproduction if they stick around and lend a beak.

对于鸟类来说，配对是一个很好策略，因为它们幼鸟需要大量照顾，所以如果雄鸟坚持在这里，并伸出喙，就会增加它们成功繁殖机会。

" So sometime during that 50-year period, the song had transitioned to this new dialect, and all the males had adopted it."

“因此，在那50年中某个时间，歌曲转变成这种新方言，所有雄鸟都接受了这种方言。”

In the beginning, the first problem that we had is that the females were not very interested in the isolate male.

刚开始，我们面临第一个问题是雌鸟对被隔离过雄鸟完全不感兴趣。

To help young birds in reproduction programs learn their notes, they have started playing male song recordings.

为了帮助在繁殖项目中幼鸟学习它们音调，他们已经开始播放雄鸟歌唱记录。

The exact reason females do not accept the males was not clear.

雌鸟不接受雄鸟确切原因还不太清楚。

When he start singing his isolate unstructured song, they say " Yuk! " and they wouldn't go with him.

雄鸟鸣唱自己独创无序歌曲时，雌鸟们非反感，不予理睬。