There have been some pretty amazing videos of animals being extraordinarily brilliant. But watching Alex the Parrot is simply heartwarming and amazing.

Alex the Parrot shot to international recognition for his language and emotional abilities. His trainer had reported he had the intelligence level of a five-year-old human.

But the parrot died suddenly and unexpectedly about two years ago on September 6t , 2007, so this is a kind of tribute to the adorable scruffy-looking bird brainiac. Apparently Alex can understand questions he hasn't been trained to answer, including counting and telling the difference between colours, shapes and sizes:

Alex the Parrot [HuffingtonPost]
Pass away [YouTube]