Pegasus, in Greek mythology, was the flying horse belonging to Bellerophon. The winged steed was born from blood which had spilled from the severed head of the Gorgon Medusa, who was already pregnant from the sea god Poseidon (a deity always associated with bulls and horses). Bellerophon was given a magic bridle by Athena to help him tame Pegasus. When the hero tried to fly to Mount Olympus, Pegasus threw him on the instruction from Zeus.
