TRICKS BIRDS PLAY WITH POSTURES: some parrots, especially mature cockatoos, Amazons, and African greys might learn to amuse themselves by playing tricks on humans with their body language.

• 一些鹦鹉，尤其成熟的葵花种属鹦鹉，亚马逊鹦鹉和非洲灰鹦鹉，学会藉牠们的肢体语言开人的玩笑来娱乐自己。