One day, as the herd funneled through a gully at the tree line, Karsten and Leanne spotted a wolf creeping up. The herd responded with a classic swarm defense.

• 一天,兽群正在缓慢穿越林木线的一条沟渠,卡斯顿与黎恩看到了一头狼正爬行过来。兽群的反应便是一个典型的群体防御。