So it's crucial for a female bird to pick as a mate the most promising father—both genetically and behaviorally.

因此对雌鸟而言，不管是基因角而行为角度择偶最为关键的就是寻找一位最有前途的父亲。

I think the female bird is more sort of brown and beige.

我认为雌鸟更像是棕色和米色。

One female bird of paradise, who sadly does not look as cool and exciting as these guys is gonna choose a mate.

一只雌性天堂鸟要选择配偶，可悲的是，它看起来不像这些家伙那样酷和令人兴奋。

The nest of the ostrich is simply a hole in the sand; and there the female bird lays ten or twelve large eggs.

鸵鸟的洞穴就是简单的在沙子里挖个洞；雌性鸵鸟会在洞里埋上十到十二个大鸵鸟蛋。

Female birds look for signs of fitness that range from the flamboyant plumage of the peacock to the bizarre dances of birds of paradise.

雌鸟择偶的标准通常会从如孔雀般华丽的羽毛到鸟类的奇异舞蹈等等。

If you're looking at a bird you may say, " I can't tell a male bird from a female bird." Hopefully you won't have that problem with humans!

如果你在看一只鸟， 你可能会说，“我无法区分雄鸟和雌鸟。 希望你不会对人类有这个问题！

Another part of this study also showed that the fossils of those brooding dinosaurs didn't have medullary bone, a type of bone tissue found in ovulating female birds that remains for a short time after they lay their eggs.

这项研究的另一部分还表明，那些育雏恐龙的化石没有髓质骨，髓质骨是一种在排卵的雌性鸟类中发现的骨组织，在它们产卵后会保留很短的时间。