The author showed us the appealing scene of spring returning to the earth: your eyes are filled with the green lawn. The birds dance gracefully and chirp happily.

作者为我们展现了春回大地的动人景象：满眼是透绿的草地，鸟儿舞动着优美的身姿，叽叽喳喳地欢跃着。

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Fishes and birds can dance.

鱼和鸟会跳舞。

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Red-crowned cranes dance the most beautiful dances in the world of birds.

丹顶鹤是在鸟类中跳舞最美的。

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Complex male bowerbird behaviour including dance routines, mimicking of other birds and the building of the bower may allow females to get an idea of a male's cognitive performance.

BBC: Earth News - Bird brains prove to be very sexy