Communication , Gestures , Colchester Zoo 溝通 , 手勢 , Colchester動物園

Do not disturb: Monkeys invent new method of communication by covering their eyes when they want to be left alone | Mail Online http://www.dailymail.co.uk/sciencetech/article-2022382/Do-disturb-Monkeys-invent-new-method-communication-covering-eyes-want-left-alone.html