why is 孔雀 called peacock?

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A:关于孔雀名字的来源，历史上还真没有统一说法，但应该不是指它们尾上覆羽的眼斑。北宋
人陆佃称，“孔”是形容孔雀的羽毛有花纹、光彩夺目；明代李时珍则在《本草纲目》的“孔
雀”条目里说，“孔，大也”——也就是说，“孔雀”就是“大个子的雀鸟”。
A:There is no agreed parlance on the source of the name of peacocks,yet it is sure that it has nothing to do with the brindle.Lu Dian,of the Northern Song
Dynasty,said,"KONG" is used to describe the dazzling brilliance on the
feather;Compendium of Materia Medica by Li Shizhen,Ming Dynasty, said in the
peacock item that "Kong"means "large",in other word,"peacock"is literally "large bird".