另一个有关家鸡认知的重大突破发生于几十年后。美国科学家对家鸡的鸣叫进行分类,最后确认它们的鸣叫共有24种不同的类型。有意思的是,很多叫声都似乎对应着特定的事件。家鸡的声音并非只会反映个体本身的状态,如“害怕”或“饥饿”。相反,它们能意识到事件的重要性,并且它们的反应也不是简单的条件反射,而是一种经过深思熟虑的行动。上世纪40年代,科学家就已经知道,当家鸡发现食物时,会做出一些复杂的动作,其中最引 Another major breakthrough in chicken cognition occurred decades later. American scientists classify the chickens’ cocks and finally confirm that there are 24 different types of their tweets. Interestingly, many voices seem to correspond to specific events. The voice of domestic chickens does not only reflect the individual’s state, such as “afraid ” or “hunger ”. On the contrary, they are aware of the importance of events and their reactions are not simply conditioned reflections but rather considered well-thought-out actions. In the 1940s, scientists already knew that when chickens found food, they made some complicated moves, the most cited