In Hellenistic imagery, Hera's chariot was pulled by peacocks, birds not known to Greeks before the conquests of Alexander. Alexander's tutor, Aristotle, refers to it as "the Persian bird." The peacock motif was revived in the Renaissance iconography that unified Hera and Juno, and which European painters focused on. A bird that had been associated with Hera on an archaic level, where most of the Aegean goddesses were associated with "their" bird, was the cuckoo, which appears in mythic fragments concerning the first wooing of a virginal Hera by Zeus.