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<正>A crow’s brain is only about the size of a human thumb,so how smart could they be?乌鸦的大脑只有人类拇指那么大,那么它们能有多聪明呢?As smart as a primate~2 While a crow’s brain may seem small in comparison~3 to a human brain,what matters is the size of the brain in relation to the size of the animal.Relative to its body,a crow’s brain and a primate’s brain are comparable.