ALEX, a celebrated African grey parrot, could recognize and name some 100 different objects, along with their color, texture and shape, as well as convey his desires and intentions by means of sentences such as “Wanna go back.”
ALEX, a celebrated African grey parrot, could recognize and name some 100 different objects, along with their color, texture and shape, as well as convey his desires and intentions by means of sentences such as “Wanna go back.” Chimpanzees can also be taught to use human language. Credit: Getty Images