Alex the parrot died at age of 31.

THE last time Irene Pepperberg saw Alex she said goodnight as usual. “You be good,” said Alex. “I love you.” “I love you, too.” “You'll be in tomorrow?” “Yes, I'll be in tomorrow.” But Alex (his name supposedly an acronym of Avian Learning Experiment) died in his cage that night, bringing to an end a life spent learning complex tasks that, it had been originally thought, only primates could master.
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A shame, then, that he is now, in the words of Monty Python, an ex-parrot.

Read the rest of the obituary at The Economist.

Alex parrot Avian Learning Experiment Pepperberg science