题目Goffin's cockatoos,a kind of small parrot native to Australasia,have been shown to have similar shape-recognition abilities to a human two-year-old.Though not known to use tools in the wild,the birds have proved skilful at tool use while kept in the cage.In a recent exper...
题目Goffin's cockatoos,a kind of small parrot native to Australasia,have been shown to have similar shape-recognition abilities to a human two-year-old.Though not known to use tools in the wild,the birds have proved skilful at tool use while kept in the cage.In a...