The reason an ability to freeze works as a defense is that a predator’s attack behavior may actually be triggered by motion. A frog, for example, will literally starve to death in a box full of dead flies. Pass one of those flies in front of its eyes on a little string, though, and it will automatically gulp it down. 冻结能作为一种防御的手段,其原因在于一个食肉动物的攻击行为可能只是由运动而引起。举例来说,一只青蛙,会在装满死苍蝇的盒子里活活饿死。用一根线绑住其中一只从它眼前经过,它就会不假思索的把苍蝇吞下去。
The response to freeze is completely hard-wired, so freezing shows us something about both predator and prey. Evolution has caused the freeze strategy to come into existence precisely because it fits in with the way the visual systems of predators operate. 对冻结的反应是动物与生俱来的,所以冻结给我们展现的是捕食者和被捕食者双方的特性。进化已使得冻结策略应运而生,因为它适应了捕食者视觉系统的运转方式。
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