根据目标距离，咕咕还会用各种方式导航。来源：smithsonianmag.com
当然，马有失蹄，鸟有失踪，如果捡到了误闯进家里的咕咕，可以查看他的脚标上可能带有的信息或者上网发帖帮他回家。
毕竟，想想牠们只有两三克精巧的脑子里，可能藏着北斗导航系统一般浩瀚的宇宙呢。
* 特别感谢Charles Walcott于康奈尔大学BIONB 2210的课堂上关于动物定向与导航的精彩讲解，其思路和案例大大促成了本文的落成。
参考资料：
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