流感也可以感染许多不同种类的温血动物，例如鸟类。

Influenza can also infect many different warm-blooded animals, such as birds.

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例如，几种鸟类以被放牧牛驱赶的昆虫为食。

For instance, several kinds of birds feed on insects flushed out of the grass by grazing cattle.

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例如，与在有遮挡的栖息地的鸟类相比，如果鸟类在风中露宿一晚，它们可能会更多地利用体温调节。

For example, birds may expend more of their reserves on thermoregulation if they spend the night exposed to the wind on a song post than if they are in a sheltered roost site.

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