On the fourth day, Al-Jahiz returned in his proper robes—the scholar’s black turban, the leather satchel heavy with papyrus rolls. “I am Al-Jahiz of Basra,” he announced. “And I have come to write the true chapter on parrots.”

The parrot could name the price of a manuscript of Sibawayh, greet a Persian merchant in his own tongue, and scold the neighborhood boys for throwing stones. But her greatest trick was this: she could judge a dispute.

She always chose the fig.