与其他昆虫辨别方向的方法相同，帝王蝶使用太阳的位置来计算方位。
As with other insect orientations, the monarch USES the position of the Sun to calculate where it should be going.
第一个要素似乎有了相当圆满的答案，我们已晓得信鸽辨别方向有两种方法。
The first part seems to be pretty well answered, and we know of two ways that pigeons tell direction.
第一个要素似乎有了相当圆满的答案，我们已晓得信鸽辨别方向有两种方法。
The first part seems to be pretty well answered, and we know of two ways that pigeons tell direction.
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