种内巢寄生 intraspecific nest parasitism
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也许这样便于知更鸟识破其巢寄生的鸟类将自己蛋放进知更鸟巢吧！
Perhaps this enables robins to spot when a parasitic bird tries to add its own eggs to the nest.
终上所述，科学家如何解释知更鸟蛋是耀眼的纯蓝色呢？也许这样便于知更鸟识破其巢寄生的鸟类将自己蛋放进知更鸟巢吧！
Given all this, how do scientists explain the fact that robin's eggs are an eye-catching, unmarked blue?
在鸟蛋开始孵化时，他们将雏鸟和巢一同取出，用微波照射鸟巢，以杀死所有的寄生虫，然后再将雏鸟和巢放回鸟箱中。
As the birds' eggs started to hatch, they removed both the nestlings and the nests from the boxes. They microwaved the nests to kill any parasites and then returned both nests and nestlings.
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