Scientists learn about monarch butterflies migration by capturing and placing identifying tags on the insects.

科学家是通过捕捉王蝶并在它们身上贴上识别标签研究它们迁徙。

The national band played for the visiting monarch.

国家乐团演奏给访王听。

All through history, we've seen royal families, powerful people, emperors, have collections of animals.

纵观历史，我们看到皇室、有权势人、王，都有动物收藏。

One of the most famous Stoic writers was also one of Rome's greatest emperors.

最著名斯多葛派作家之一，同样也是罗马最伟王之一。

The differing opinions about monarchs draw on different data.

关于王蝶同观点同数据。

But yeah, " Monarch." Okay, yes. - Yeah, so... - Complex organization.

但确实，《王计划》。好，对。- 是，所以… … - 组织复杂。

But were they portraits of the emperor's soldiers?

它们究竟是王战士肖像？

For example, monarch butterfly caterpillars can fit on a pencil eraser when they hatch.

例如，王蝶毛虫孵化时可以放在铅笔橡皮擦上。

Under the surface, in China's heart, these warriors still await command.

地之下，在中国之心深处，这些勇士仍在等待着王号令。

The year after that the survey recorded 335,479 monarchs.

在那之后一年，调查记录了335479只王蝶。

Monarch butterflies are known for their clear orange-and-black markings.

王蝶以其清晰橙黑色斑纹而闻名。

What we find is that the monarchs strongly prefer the medicinal milkweed.

我们发现王斑蝶偏好药性乳草。

Monarch butterflies are known for their clear orange-and-black markings. They live across North America.

王蝶以其鲜明橙黑相间斑纹而闻名。它们生活在北美洲各地。

There's a sense of regal dignity and mirth, levity and gravitas.

这里有一种王般荣誉，欢乐、轻松和庄严感觉。

The average monarch lives about nine months.

王蝶平均能活概九个月。

Those data show an 85 percent drop since the mid-1990s.

这些数据显示， 20 世纪 90 年代中期以，王蝶数量下降了 85%。

So, if you plant more of this, you get more monarchs, and monarchs are currently endangered.

所以，如果你种植更多这种植物，就会得到更多王蝶，而王蝶目前正濒临灭绝。

These plants can help give monarchs the energy they need for their yearly migration in autumn.

这些植物可以帮助提供王蝶在秋季进行年度迁徙所需能量。

This can make it harder for monarchs to know when it is time to migrate.

这可能会让王蝶确定迁徙时间。

Monarchs in the eastern United States spend the winter in Mexico.

美国东部王蝶在墨西哥过冬。