非洲有一条最大的河流——一马拉河,流入世界第二大湖——维亚湖。它源自席瑞亚峭壁之下毛林林中的一系列泉水。从这里,它还流经世界最大公园——一马塞马拉大平原。马拉河是这些生物的泉源,但却也隐藏着无数的死亡陷阱。当动物们来到河边饮水时,死亡就潜伏在河中等待袭击的鳄鱼。多年来,马拉河已变成最低陷河,吸引着无数动物。这群羚羊不像斑马经常渡河,因此对于河中隐藏的鳄鱼认识较浅。即使清楚地看见15只鲤鱼在河中等着猎食,为首的羚羊并未意识到危险。一旦它进入河水,其余羚羊也本能地跟进,演绎了一幕自投罗网的大猎杀。22只羚羊中超过半数活生生血淋淋地被鳄鱼所吞食。 经过百万年的进化,鳄鱼已被塑造成完美的杀人机器。它在水面上只露出眼、听、嗅觉三种感官同时运用。攻击时有力的带蹼脚掌帮助它向前推进的速度,而它的耐性与狡猾更是致命关键,真可谓“水中恶霸”。The Rivers of Africa shape the lives of those who call their banks home- in the African wilderness there can be no life without water. The continents rivers are the focal point of the dramas of the bushveld- the same river that gives life also harbours death. For the many creatures that live along Africa's rivers - the need to quench their thirst is an essential part of their lives- but rivers such as the Mara in Kenya are a barrier for animals where death comes in many guises- but each animal has their own way of navigating these treacherous waters.