In fact, their fossilized conga lines represent some of the first evidence of animal group behaviour.

事实上，他们的康茄线化石代表了动物群体行为的一些最初证据。

The key to positive group behaviour and intervention, Levine explains, " is building a sense of shared identity" .

积极的群体行为和干预的关键“ 莱文解释说，是建立一种共同的认同感” 。