英語(yǔ)聽力：自然百科 火烈鳥與狒狒

This is East Africa, the Great Rift Valley, a land in constant upheaval. The flamingos and baboons here at Lake Bogoria live in harmony. They share this landscape and all it has to offer. They may not be compatible. But in the midst of Bogoria's bounty, they can afford to be indifferent.

In July, after a successful breeding season, nearly four million flamingos gather along the scenes of the Great Rift Valley. They carve the inlets and crowd the local residents.

The baboons who live here all year round can't help but take notice of the sheer numbers of new arrivers. Some baboons have never seen these many flamingos before, and some of them don't know how to behave.

There are so many birds at Bogoria that they trip over each other in order to escape. Baboons aren't meat eaters, but this is something unusual for baboons. Choosing between fruits and flesh is a simple matter for these meat eaters.

Until now, such an orchestrated attack on flamingos has rarely been witnessed or recorded. Thegraceful wading birds become a buffet of pink feathers and crimson flesh.

The young have discovered a new taste and they like it. Perhaps this is nature's coldly indifferent way of restoring balance.