“因为美洲红尾鸲每年都返回同一地区繁殖后代，所以返回时间推迟会使它们的到达时期与繁殖时期很难保持一致。”Studds说。

"Because American redstarts return to the same site to breed each year, arriving later may make it harder for them remain to remain in synch with their breeding cycle," Studds said.

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“因为美洲红尾鸲每年都返回同一地区繁殖后代，所以返回时间推迟会使它们的到达时期与繁殖时期很难保持一致。”Studds说。

"Because American redstarts return to the same site to breed each year, arriving later may make it harder for them remain to remain in synch with their breeding cycle," Studds said.

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