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科学美国人60秒:每只啄木鸟都有自己的啄击音调

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This is Scientific American — 60-Second Science. I'm Christopher Intagliata.
Humans can recognize each other by voice alone. I sound different from other 60-Second Science reporters, for example. In fact, lots of nonhuman animals, of all types, use voices to distinguish familiar individuals...including frogs, fish, lemurs, and penguins.
And that unique audio fingerprint extends to a sound you may have heard in the forest on occasion: (woodpecker drumming)...the drumming of a woodpecker.
Researchers recorded multiple drum rolls, (woodpecker drumming) from 41 great spotted woodpeckers—colorful red, white and black birds—living in Polish forests. They then used audio software to analyze them.

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啄木鸟.jpg
And they found that the length of the drumrolls, and the spacing between beats varied enough from bird to bird to tell the woodpeckers apart by drumming alone. The study is in the journal PLOS ONE.
The scientists say this fact might be useful to woodpeckers, in identifying each other. And to conservation biologists, trying to tease one bird from another in a recording, for example, to count individuals in a given area. The birds' head-banging could thus do away with that research headache.
Thanks for listening for Scientific American — 60-Second Science. I'm Christopher Intagliata.

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重点单词   查看全部解释    
varied ['vɛərid]

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adj. 各种各样的 动词vary的过去式和过去分词

 
tease [ti:z]

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n. 揶揄者,戏弄
v. 欺负,嘲弄

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fingerprint ['fiŋgə.print]

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n. 指纹,特点 vt. 取 ... 的指纹,鉴别特征

 
drum [drʌm]

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n. 鼓,鼓声,鼓状物
vi. 击鼓,连续敲击

 
recording [ri'kɔ:diŋ]

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n. 录音 动词record的现在分词

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polish ['pɔliʃ]

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n. 光泽,上光剂,优雅,精良
v. 擦亮,磨

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multiple ['mʌltipl]

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adj. 许多,多种多样的
n. 倍数,并联

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unique [ju:'ni:k]

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adj. 独一无二的,独特的,稀罕的

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conservation [.kɔnsə:'veiʃən]

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n. 保存,防止流失,守恒,保护自然资源

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magnified

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adj. 放大的 v. 放大;夸张(magnify的过去

 

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