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？

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

“我们刚才经过了一只蜂鸟，你有没有听到？”

The Rufous hummingbird is around 7 centimetres.

红褐蜂鸟身长约7厘米。

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

蜂鸟中最小的是原产的吸蜜蜂鸟。

So kind of like a hummingbird wings.

有点像蜂鸟的翅膀。

That even beats a hummingbird's hyperactive heart, and more than 15 times the average human's.

它甚至超过了蜂鸟的心率，也比一般人的心活跃15倍多。

Scientists have identified a new hummingbird species in the Ecuadorian Andes.

家在厄瓜多尔安第斯山脉发现了新品种蜂鸟。

Pinnipeds-walruses, seals and sea lions. And parrots, hummingbirds and songbirds. That's it.

再加上海象、海豹和海狮等鳍足亚目动物，以及鹦鹉、蜂鸟和鸣禽。全部就是这些。

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。

Hummingbirds fly in the forests here, in Star Zoo.

蜂鸟是在这森林里飞的，在星际动物园。

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。

One hummingbird has gone to great lengths to avoid conflict with other species.

有一种蜂鸟为了避免与其他物种发生冲突，可谓煞费苦心。

Other animals such as hummingbirds enter hyperphagia before long migration periods.

其他动物，如蜂鸟，在长时间迁徙之前就进入了食欲过度状态。

Her relative in Montana shared a list that included hawks, raptors and hummingbirds.

她在蒙大拿州的亲戚分享了一份名单，其中包括鹰、猛禽和蜂鸟。

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

她将这一天称为“蜂鸟贡献日”。

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。

McKechnie and his colleagues have studied hummingbirds at extreme elevations in the Peruvian Andes.

麦凯尼和同事研究了秘鲁安第斯山脉极端海拔地区的蜂鸟。

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

也许还有几只大黄蜂蝙蝠和一只蜂鸟。

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

事实上，蜂鸟是唯一能后退飞行的鸟。

But there's no way to learn to fly like a hummingbird unless you fly.

但是无法会象蜂鸟一样飞。除非不停地习飞行。