Hummingbirds are the smallest birds. But what type of hummingbird is the smallest?

蜂鸟是最小的鸟类。但是哪种蜂鸟最小呢？

Unlike the other hummers, swordbills can't reach their feathers with their beak.

不像其它蜂鸟，刀嘴蜂鸟的喙够不到身上的羽毛。

So kind of like a hummingbird wings.

有像蜂鸟的翅膀。

The Rufous hummingbird is around 7 centimetres.

红褐蜂鸟身长约7厘米。

We set up a hummingbird feeder here.

我们在这儿放了个蜂鸟给食器。

My father said, 'Her name is Hummingbird.'

“的名字叫蜂鸟。”

A swordbill's extraordinary beak, however, enables it to reach the places that others can't.

然而，刀嘴蜂鸟的喙非同般，能让它吃到其他蜂鸟无法触及的花蜜。

She referred to the day as " a 'hummingbird' contribution day."

将这为“蜂鸟贡献日”。

Maybe even a couple of bumblebee bats and a bee hummingbird.

也许还有几只大黄蜂蝙蝠和只蜂鸟。

These Rufous Hummingbirds have migrated to the forest to breed.

这些棕蜂鸟已经迁徙到森林里来生活了。

" We've just got passed by a hummingbird. Did you hear that? "

“我们刚才经过了只蜂鸟，你有没有听到？”

Why do hummingbirds have these amazing colors?

为什么蜂鸟有这些好看的颜色？

I'll have to eat like a hummingbird just to keep from freezing to death.

我得像蜂鸟那样吃东西才能不被冻死。

In fact, the hummingbird is the only bird that can fly backwards.

事实上，蜂鸟是唯能后退飞行的鸟。

Let me show you how this hummingbird, this rotorcraft, works.

我们来看看“蜂鸟”是如何工作的。

The smallest of the hummingbirds is the Bee which is native to Cuba.

蜂鸟中最小的是原产于古巴的吸蜜蜂鸟。

It has found a solution that means it doesn't have to join the fight.

它找到了解决方法，不必和其它蜂鸟争夺食物。

Nobody knows what a hummingbird looks like, but we know what birds are.

没人知道蜂鸟长得什么样，可我们知道什么是鸟。

In hummingbirds, these mutations allow this receptor to detect sugars, too.

在蜂鸟身上，这些突变也让这种受体能够检测糖。

But, you ask, why are they called humming birds?

然而，您可能会问，它们为何被为蜂鸟呢？