Meanwhile, the spooked herds stampede up the valley.

与此同时，受到惊吓的兽群争纷逃离山谷。

The herd is kind of broken up into three distinctive groups.

兽群会分解成三个不同的小团体。

Herds – or groups of horses - can double in size every four to five years.

兽群——这里指马群——每四到五年规模就会扩大一倍。

Autumn is mating season. And a couple of nomadic males have started shadowing their herd.

秋季是交配的季节。两只流浪的雄性猛犸象已经开始追寻他们兽群的足迹。

Lake beds evaporated and then filled, herds thinned out and then grew bigger.

湖床干了又湿，兽群数量减了又增。大地阳光炙烤后，又雨水淹没。

Unfortunately, it is impossible to tag more than a few individuals in a herd, flock or swarm.

不幸的是，定的个体只是兽群、鸟群或蜂群中的少数。

If separated from the group, the lone Tenontosaurus had to rely on anything available, including the environment.

倘若从兽群分散，独行的腱龙只依靠各种防御括环境。

Lions are a perfect example of how they'll seek out members of the herd and target the weakest for attack.

狮子就是绝佳的例子，它们挑出兽群中的成员并以其中最弱的为目发动进攻。

The predators will catch the weaker ones, the laggards, they will grab off individuals in the periphery of the group.

掠食者会捕捉体弱和落在后面的，它们会从兽群边缘抢走个体。

The sense of smell in Deinonychus could alert it to a herd, a family group of plant eaters 10,15,20,30 miles away.

灵敏的嗅觉使恐爪龙嗅到十到三十英里外的食草动物兽群。

TO BREAK AWAY FROM ITS HERD.

从兽群里掉队。

To make things worse, fossil evidence shows that juveniles live alone, separated from the herd until they reach at least a third of their adult weight.

更糟的是化石证据表明，幼龙是独居的，它们远离兽群直到体重达到成年龙的三分之一以上。

Since this duckbill skeleton was found by itself, it's easy to believe that it was either separated from the herd, or was alone when it was attacked.

因为这头鸭嘴龙的骨骼单独发现，很容易想到它要么是离开了兽群或者是攻击时在独行。

These Albertosaurus know that a weak member of the herd is less likely to put up a vigorous defense and so their chances of being injured are reduced.

这些阿尔伯特龙知道兽群里的弱者比较不可会奋起反抗，所以它们自己受伤的几率就降低了。

At the same moment a sinewy brown hand caught the frightened horse by the curb, and forcing a way through the drove, soon brought her to the outskirts.

这时，一只强有力的棕色大手，一把捉住了惊马的嚼环，并且在牛群中挤出了一条出路，不大功夫，就把她带到了兽群之外。

Members from each herd recognize each other despite time apart, and many investigate each other's mouths with their trunks to smell what their counterparts have been eating.

尽管时间间隔不同，但每个兽群的成员都认出彼此，许多成员会用鼻子探查对方的嘴巴，以闻到对方吃过的东西。

Global media started paying attention to the roving herd about a year ago, as the beasts started wreaking havoc through Yunnan's farmlands on a seemingly aimless migration northeast.

大约一年前， 全球媒体开始关注流浪兽群，因为这些野兽开始在云南的农田中肆虐， 看似漫无目的地向东北迁徙。

Choked by the rising cloud of dust and by the steam from the struggling creatures, she might have abandoned her efforts in despair, but for a kindly voice at her elbow which assured her of assistance.

同时尘土飞扬，再加上拥挤的兽群里蒸发出来的气味使人透不过起来。在这紧要关头，如果不是身旁出现了一种亲切的声音，使她确信有人前来相助，露茜眼看就要绝望，不再坚持下去了。

They were probably hiding out in the forest, trying to eat as much as they could, get as big as they could as fast as they could so that they could join the herd. That's the best defense.

而很可是躲在森林里，尽可多吃点东西，尽快尽可地长大，然后它们就加入兽群了。那就是最好的防卫之道。