Well, did you know that in several laboratory experiments scrub jays, relatives of the blue jay, hid their extra food more cautiously when other jays were around?

• 你不知道一些实验室在对蜂鸟做一些研究，蜂鸟是蓝色蜂鸟的近亲，他们在其他同伴的面前小心翼翼地将多余的食物藏起来。