This is one of the largest concentrations of Nile crocodiles in Africa, 这里是非洲一处最大的尼罗鳄聚集地
The flock stay in close contact by calling one another. 鹤群通过互相鸣叫保持密切联系
But each year over 50,000 demoiselle cranes set out on one of the most challenging migrations on Earth. 可是 5万多只蓑羽鹤每年都会 进行一场地球上最具挑战性的迁徙
one inhabitant endures the bitter winters out in the open. 有一位居民在户外忍受着严冬的寒冷
for its world is one we seldom visit. 因为我们很少涉足它们的世界
She has just one brief summer in which to teach them their mountain survival techniques. 母狮只能利用这个短暂的夏天 教会小狮在山区生存的技能