but they must still survive the attacks of other, more specialised, birds of prey. 但它们仍须躲过 其它更专业的猛禽的攻击
Peregrine falcons and bat hawks are the jetfighters of the bird world. 游隼和蝠鹞是鸟类中的喷气式战斗机
three million bats leave the safety of the cave 300万只蝙蝠一起离开安全的洞穴
They're totally dependant on the digested remains of food that's brought here from outside. 它们完全依赖的食物消化残渣 都是来自于外界
The droppings also support other types of cockroaches 粪便也能养活其它种类的蟑螂
which spend part of their day resting on cave walls. 它们一天大部分时间都呆在洞壁上
Caves are one of the few habitats on Earth not directly powered by sunlight. 洞穴是地球上少数几种 不直接依赖阳光的生态环境之一
In the absence of plants this food chain is based on a continuous supply of bat droppings. 在缺少植物的情况下 这里的食物链 完全依赖供应不断的蝙蝠粪便
This hundred metre high mound is made entirely of bat droppings - 这堆100多米高的东西 全都是蝙蝠的排泄物