Hercules mounted a hill near the lake, and began frightening the birds by the noise of the rattles. The Stymphalides could not endure the awful noise and flew, terrified, out of the forest. Then Hercules seized his bow and sent arrow after arrow in pursuit of them, shooting many as they flew. Those who were not killed left the lake and never returned.
King Minos of Crete had promised Neptune (Poseidon), god of the sea, to offer to him whatever animal should first come up out of the water, for he declared he had no animal that was worthy for so high a sacrifice. Therefore the god caused a very beautiful ox to rise out of the sea. But the king was so taken with the noble appearance of the animal that he secretly placed it among his own herds and offered another to Neptune. Angered by this, the god had caused the animal to become mad, and it was bringing great destruction to the island of Crete. To capture this animal, master it, and bring it before Eurystheus, was the seventh labor of Hercules.
When the hero came to Crete and with this intention stepped before Minos, the king was not a little pleased over the prospect of ridding the island of the bull, and he himself helped Hercules to capture the raging animal. Hercules approached the dreadful monster without fear, and so thoroughly did he master him that he rode home on the animal the whole way to the sea.
With this work Eurystheus was pleased, and after he had regarded the animal for a time with pleasure, set it free. No longer under Hercules' management, the ox became wild again, wandered through all Laconia and Arcadia, crossed over the isthmus to Marathon in Attica and devastated the country there as formerly on the island of Crete. Later it was given to the hero Theseus to become master over him.
The eighth labor of Hercules was to bring the mares of the Thracian Diomede to Mycene. Diomede was a son of Mars and ruler of the Bistonians, a very warlike people. He had mares so wild and strong that they had to be fastened with iron chains. Their fodder was chiefly hay; but strangers who had the misfortune to come into the city were thrown before them, their flesh serving the animals as food.
When Hercules arrived the first thing he did was to seize the inhuman king himself and after he had overpowered the keepers, throw him before his own mares. With this food the animals were satisfied and Hercules was able to drive them to the sea.