So why don't the geese just leave their wintering grounds earlier?

那为什么这些雁不能早点离开过冬地呢？

Tracking sparrows from western Canada revealed that they intermingle with eastern birds on their wintering grounds in the southern Great Plains.

追踪加拿大西部白喉带鹀的项目发现，它们在大平原南部越冬地时，与东部鸟类待在一起。

Nolet and his colleagues found that the geese did not leave their wintering grounds sooner to match the earlier Arctic spring.

诺莱特和同事发现，白颊黑雁并没有提前离开过冬地以适应北极的早春。

So, what we did is we used satellite tags to track their migrations out of that Auckland Islands wintering ground and follow them around the Southern Ocean.

“我们使用了卫星追踪装置来跟踪它们从奥克兰群岛的越冬地迁移出来的过程，并跟踪它们到了南冰洋周围。

Then, come fall, they begin the trip back to their wintering grounds.

然后，秋天来了，他们开始返回越冬地的旅程。

The number one songs she's talking about are the tunes sung by humpback whales in the South Pacific, which Owen's team recorded at half a dozen wintering grounds.

她谈到的榜首歌曲是南太平洋座头鲸唱的曲调，由欧文的团队在六个越冬地录制。

Clare Owen, a marine scientist at the University of St. Andrews. The number one songs she's talking about are the tunes sung by humpback whales in the South Pacific, which Owen's team recorded at half a dozen wintering grounds.

克莱尔·欧文，圣安德鲁斯大学的海洋科学家。 她谈论的第一首歌曲是南太平洋座头鲸演唱的曲调， 欧文的团队在六个越冬地录制了这些曲调。