Each may have just a single chance to impress a female.

只有一个机会来取得雌鸟的芳。

Evolutionary psychologists have argued that what we know today as KISSING may have come from kiss-feeding, the exchange of pre-chewed food from one mouth to another.Mother birds are famous for doing this.

进化理学家认为我今日所熟知的“接吻”可能是由“咀嚼喂养”而来，即将咀嚼过的食物从一方口中喂到另一方。雌鸟正以此而闻名。

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

雌鸟不接受雄鸟的确切原因还不太清楚。

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

但在鸟类中，通常只有当雌鸟不在雄鸟身边的时候，才会发生无性繁殖。

When it's over, females crouch and wait to be mated.

战斗结束时雌鸟下来，等待交配。

And for nightingales, it's the most elaborate song that apparently wins the day.

而至于夜莺，最备的歌曲无疑能够赢得雌鸟芳。

Birds make eggshells from materials from inside their hollow bones.

雌鸟产卵以中空骨头里的物质为材料。

His bachelor pad is sufficiently neat and tidy to attract a female.

他的单身公寓干净整洁，很能吸引雌鸟。

The mother bird flew about him with cries of anger. He used his gun as a club with which to hit her, but she flew beyond his reach.

雌鸟大吵大叫地在他周围扑来扑去，他把枪当作棍子来打它，可是它闪开了。

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.

雄鸟通过明亮醒目的羽毛向雌鸟展示它的强壮与健康，这样雌鸟就会知道它能成为一名好的父亲。

Deep in the forest, a male superb bird of paradise struts his stuff for a rather drab female but she isn't the only one watching.

丛林深处一只极品雄性天堂鸟向一只土土的雌鸟展示自己华丽的羽毛，但她却不是唯一的观众。

Well, when I measured the femur around — so particularly in this case it was a female — it was over a foot in circumference.

我测量了它的股骨维度——特别的是这次是只雌鸟——其股骨周长超过了 30 厘米。

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，有一只雌鸟绝望了，和那只雄鸟结合了，然后它有了孩子，孩子开始模仿父亲。

So we're asking people to please be aware that females sing and to actually get a look at the bird that you're recording.

因此，我请人注意雌鸟的鸣叫现象，在录音时观察一下它。”

The female signals her submission with open wings.

雌鸟张开翅膀表示服从。

But the researchers also plan to test whether the new dialect's popularity is driven by a female preference for novelty.

但研究人员也计划进行测试，看看这种新方言的流行是否是由雌鸟对新奇事物的偏好所驱动。

The researchers said they believe it is the first case of asexual reproduction in any bird species where the female had access to a mate.

研究人员表示，他认为，这是鸟类中第一例雌鸟在有交配机会的情况下进行的无性繁殖。

He threw stones at her and by chance, one broke a wing. Then she ran away, dragging the broken wing, with him following her.

他投石子打它，碰巧打伤了它一个翅膀。雌鸟拍击着受伤的翅膀逃开了，他就在后面追赶。

Out on a golf course in Townsville, Australia, he's putting the final touches to his enormous bower, that he hopes will impress a visiting female.

澳大利亚汤斯维尔市的高尔夫球场上，他正在为这座巨型凉亭做最后的修饰，争取能够博得来访雌鸟的青睐。

And one of the reasons for that is that the females would have stored materials within those in order to make the eggs.

其中一个原因是，雌鸟会在这些骨头中储存材料，以便制造鸟蛋。