The carrion crow is old and decrepit, deaf, round of back, and very avaricious. Partially deformed by old age, this fool completes his transformation from nobleman to parasite by being tricked into disinheriting his son.

The irony of Corbaccio’s spiritual condition is wrapped up in his physical condition: He really expects to outlive Volpone and inherit his wealth! This comic character flaw is not physical blindness but spiritual blindness.