在其它实验中，两只不同的鸟——皮埃尔和科布，也在三个独立场景中利用了工具进行初次接触。
In other experiments, two different birds, called Pierre and Corbeau, also made the first approach with tools on three separate occasions.
他经常为了他认为的鸟的尸体而停车，但却发现是被人丢弃的香蕉皮。
He regularly pulls over for what he thinks are bird remains only to find discarded banana peels.
用动物皮和鸟毛来做。
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