No two bird species are the same.

没有哪两种鸟类是相同的。

Each bird species has effectively its own language.

“实际上每种鸟类都有自已的语言。”

Rainforests are home to countless bird species, for example.

例如，热带雨林是无数鸟类的家园。

The cranes -- among the oldest-known bird species -- are worth the trip.

作为已知最古老的鸟类之一，鹤的迁徙值得一观。

They are the most numerous bird species on Earth, ravenous for grain.

它们是地球上数量最多的鸟类，贪嗜谷物。

The same version of the virus has appeared in many bird species.

同一版本的病毒已经在许多鸟类身上出现。

The question was why were some bird species shrinking faster than others?

问题是为什么一些鸟类物种比其他物种变小的速度更快？

There's a bird species native to the region that likes to dance.

当地有一种喜欢跳舞的鸟类。

They also knew how often a bird species is seen in certain places.

他们还知道鸟类在某些地方的出现频率。

Many studies have analysed the effects in specific locations or on specific bird species.

许多研究分析了这对特定地点或特定鸟类的影响。

The pointy-headed songbirds are talented mimics, often copying the vocalizations of other bird species.

这些聪明的鸣鸟是天才模仿者，它们经常模仿其它鸟类的叫声。

Over 300 bird species on the continent are already considered threatened or critically endangered.

非洲大陆上超过300种鸟类已被认为是濒危或极度濒危物种。

And when they vacate their nests after a year, other bird species move in.

当它们一年后离开巢穴时，其他鸟类也会搬进来。

The question was … why were some bird species shrinking faster than others?

为什么有些鸟类比别的鸟类更快缩小？

Visitors are drawn to the park because of its rare and unique bird species.

许多游客由于其稀有而独特的鸟类物种而被吸引到公园。

Replacing trees with buildings means a loss of more than 90 percent of bird species.

建筑物代替树木意味着丧失了超过90%的鸟类物种。

In some bird species, both parents take turns keeping the eggs warm, or incubating them.

一些鸟类中，父母双方会轮流给蛋保暖来孵化它们。

Some established breeding populations. And some of these new populations are saving entire bird species.

有一些已经建立了繁殖种群。其中一些新种群正在拯救整个鹦鹉物种。

The small bird species native to Ecuador's Galapagos Island chain is dwindling in number.

这种原产于厄瓜多尔加拉帕戈斯群岛的小型鸟类的数量正在减少。

In many bird species, the oldest would simply outcompete the youngest, but barn owls are different.

在大多数鸟类中，最年长的鸟能轻松战胜最年轻的鸟，但仓鸮则不同。