translation.en: Turns out, if you have fur or feathers or skin, you can pluck yourself compulsively, and some parrots actually have been studied to better understand trichotillomania, or compulsive plucking in humans, something that affects 20 million Americans right now.
translation.zh: 原来，只要你有皮毛，羽毛，或皮肤 你就可能强迫性地拔毛， 人们通过研究鹦鹉 试图找出人类【拔毛癖】 或强迫性拔毛的原因。 一个正在困扰两千万美国人的问题。