日本高清色视频在线视频在,国产香蕉97碰碰视频碰碰看,丰满少妇av无码区,精品无码专区在线,久久无码专区免费看,四虎欧美精品永久地址99,亚洲色无码一区二区三区

文字稿:

You might think standing out in the wild would work against you.

But for flamingos, it's the pinker and older birds who seem to be the key individuals in the flock.

That's the conclusion reached by researchers in Britain. They are trying to understand the animals in order to help them thrive in captivity.

Four of the six remaining species of flamingo are threatened with extinction. Many of their wetland habitats are being affected by mining.

Vocabulary 詞匯:

standing out 顯眼

flock 鳥群

thrive 茁壯成長

extinction 滅絕

wetland 沼澤地，濕地