由于莺和其它的小型鸟类在它们的巢中产卵,自然这些小型鸟类就很害怕鹰,并且对鹰敬而远之。
and give them a wide berth. Such leeway would make it easier for a female cuckoo to laywhere she chose.
这样的空当就给了雌杜鹃自由选择巢穴产卵的机会。
Nick Davies and Justin Welbergen, a pair of ornithologists at Cambridge University, have nowcorrected that omission.
尼克戴维斯贾斯汀韦伯尔根是剑桥大学的鸟类学专家,它们现在补充了这种遗漏。
They have tested the idea that cuckoos mimic hawksor, at least, that warblers thinkcuckoos look hawklike.
它们已经证实了杜鹃会模仿鹰或者说,至少在莺看来,杜鹃非常像鹰。
As they report in the latest edition of Behavioral Ecology, they have found that it is true, butonly up to a point.
就像它们在最新一期的Behavioral Ecology上报道的那样,它们已经发现这是正确的,但至少在某种程度上可以这么讲。
To carry out their test, Dr Davies and Dr Welbergen put stuffed birds near reed-warblernests,
为了进行它们的测试,戴维斯博士和韦伯尔根博士将几种鸟类标本放到了莺的芦苇巢附近,
to observe the nestholders reactions.
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