Crows' excellent memory helps them tell human friend from 敵

By Mail Foreign Service
Updated:

They may not crow about it, but if you get on the wrong 味方する of them, they’re not going to forget it in a hurry.

Crows have an excellent memory for human 直面するs, a 熟考する／考慮する has 明らかにする／漏らすd.

They can tell the difference between a friendly 直面する and a dangerous one, and can 警告する each other which is which.

Crows have an excellent memory for human faces, a study has revealed

Bird brain: Crows have an excellent memory for human 直面するs, a 熟考する／考慮する has 明らかにする／漏らすd

And the birds ? which are said to be as intelligent as chimpanzees ? will remember the 直面する of someone who 提起する／ポーズをとるs a 脅し to them for at least five years.

Dr John Marzluff, of the University of Washington, said: ‘Our findings 追加する to the 発展させるing 見解（をとる） of large-brained, social and long-lived birds like crows 存在 on a cognitive par with our closest 親族s.’

A team of scientists from the university exposed crows in Seattle to a ‘dangerous 直面する’ by wearing a mask while trapping, banding and 解放（する）ing birds at five 場所／位置s.

Over a five-year period after the trapping had stopped, they 設立する that the mask received an ますます 敵意を持った 返答 from birds in the area ? 示唆するing that the 逮捕（する）d birds had been able to 警告する others.

Dr Marzluff 追加するd: ‘Because human 活動／戦闘s often 脅す animals, learning socially about individual people’s habits would be advantageous.

‘The number of crows scolding the dangerous mask continued to 増加する for five years after trapping, as 推定する／予想するd if social learning or social stimulation were 現在の.

‘As we 行為／行うd 裁判，公判s, walking with the dangerous mask along the 大勝する, our 活動／戦闘s 現在のd 適切な時期s for crows to 観察する or be 刺激するd by scolding.

‘The number of crows 遭遇（する）d was 一貫した across 裁判，公判s, but the number that scolded the dangerous mask 増加するd 刻々と.’


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