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

最小的类。但哪最小呢？

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

“我们刚才经过了一只，你有没有听到？”

The Rufous hummingbird is around 7 centimetres.

红褐身长约7厘米。

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

中最小的原产于古巴的吸蜜。

So kind of like a hummingbird wings.

有点像的翅膀。

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.

科学家在厄瓜多尔安第斯山脉发现了新品。

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、和鸣禽。全部就这些。

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

没人知道长得样，可我们知道。

Hummingbirds fly in the forests here, in Star Zoo.

在这森林里飞的，在星际动物园。

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

在身上，这些突变也让这受体能够检测糖。

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

有一为了避免与其他物发生冲突，可谓煞费苦心。

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

其他动物，如，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。

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

她将这一天称为“贡献日”。

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

我得像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。

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

也许还有几只大黄蝙蝠和一只。

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

事实上，唯一能后退飞行的。

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

但无法学会象一样飞。除非不停地学习飞行。