新闻报报看 | 乌鸦除了记忆力强大，甚至还会“记仇”长达17年！根据美国华盛顿大学针对乌鸦的一项实验发现，乌鸦不只能够识别和记住，那些曾经威胁或激怒过它们的人，而且还能准确追踪这些复仇对象的回家路线。（主播：颜江瀚、蔡心慧）
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00:30Crows can not only recognize and remember those who have threatened them and angered them,
00:36but also accurately track the route home for these vengeful objects.
01:00There was a time when a professor encountered a large group of crows in the campus,
01:07and there were 53 of them.
01:10Of these, 47 of them made an aggressive cry to him.
01:14Therefore, the professor believes that crows can not only distinguish enemies,
01:18but also recognize and threaten objects by observing their companions' behavior.
01:30Crows may use their cries to express that their brothers are like them.
01:34However, as time goes by, the hatred of crows not only does not dissipate, but also becomes stronger.
01:39In the seventh year of the experiment, it reached a peak.
01:42According to the professor's experiment record,
01:44every time he wears a horror mask and goes out,
01:47almost half of the crows on the road will attack him.
01:52The maintenance of this group memory shows the super-strong memory of crows,
01:56as well as the long-term state of high alertness and hostility to enemies.
02:01Until last September, when the professor wore a mask and went out,
02:0516 crows he encountered did not attack him,
02:09which means that the cycle of crow hatred has completely disappeared.
02:13The 17-year experiment has also come to an end.
02:16In fact, in the process of the experiment,
02:18in order to verify whether crows can distinguish and threaten objects,
02:21the research team also tried other experiments.
02:23For example, wearing the mask of former US Vice President Dick Cheney to feed the crows.
02:28However, since these feeders did not pose any threat to the crows,
02:32they were not disturbed by the crows.
02:35This further proves that crows can distinguish the face of harmful and harmless to them.