The survival of Northern Cardinal nestlings did not seem to be related to the presence of these nest predators or even to bird feeders.

北美红雀的生存状况似乎与巢捕食者甚至鸟类饲养者没有关系。 但美国罗宾斯讲述了一个不同的故事。

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The survival of Northern Cardinal nestlings did not seem to be related to the presence of these nest predators or even to bird feeders.

北美红雀的生存状况似乎与巢捕食者甚至鸟类饲养者没有关系。 但美国罗宾斯讲述了一个不同的故事。

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