Stymphalian Birds
The Stymphalian Birds were a flock of man-eating birds with bronze beaks, wings, and claws that had overrun the marshes around Lake Stymphalus in Arcadia. Unable to approach through the swamp, Heracles used a pair of bronze castanets Athena had received from Hephaestus to startle the birds into flight, then shot down a number of them with his bow as the rest fled to an island in the Black Sea.
The Stymphalian Birds, man-eating flock
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Core Myth
By the time Eurystheus assigned Heracles his sixth labor, a great flock of man-eating birds had taken over the marshes surrounding Lake Stymphalus, in Arcadia. Later sources describe them with bronze beaks, wings, and claws, and some say they could loose their sharp bronze feathers like arrows at anything approaching. Apollodorus records that the birds had multiplied there in part because they had been driven from elsewhere by wolves, and that the marsh itself was too thick and unstable underfoot for Heracles to wade in and drive them out by force. Athena solved the practical problem: she gave Heracles a pair of bronze castanets, or rattles, that the smith-god Hephaestus had made for her. Climbing a mountain overlooking the lake, Heracles clashed the castanets together, and the sudden, unfamiliar noise startled the entire flock into the air at once. With the birds now in flight rather than hidden in the reeds, Heracles was able to shoot down a considerable number of them with his bow as they rose. The rest of the flock did not simply vanish, however: Apollodorus and Apollonius of Rhodes both record that the survivors fled across the sea to a deserted island called Aretias, sacred to the war-god Ares, in the Black Sea. The labor was judged complete once the birds no longer threatened Arcadia, even though the flock itself was not wiped out. Years later, Apollonius describes the Argonauts running into this same surviving population on their own voyage, when the birds greeted their ship by raining down bronze feathers sharp enough to wound, forcing the crew to beat their shields and shout to drive the birds off a second time.
Did Heracles kill the Stymphalian Birds or just drive them away?
Both, depending on the moment. Apollodorus describes Heracles shooting down a number of the birds with his bow once the castanets' noise forced them into the air, but the labor's real solution was driving the surviving flock away from Arcadia entirely rather than exterminating every bird - the survivors are later said to have fled across the sea.
Apollodorus, Library 2.5.6
Why couldn't Heracles just walk into the marsh and fight the birds directly?
The ground around Lake Stymphalus was too thick and unstable to cross on foot, according to Apollodorus, which meant Heracles could not simply wade in and attack the birds where they nested. He needed a way to draw them out into the open instead, which is why the labor's solution depends on noise rather than a direct assault.
Apollodorus, Library 2.5.6
What were the bronze castanets, and where did they come from?
They were a pair of noise-making instruments, sometimes described as rattles, that the smith-god Hephaestus had made and given to Athena. She lent them to Heracles specifically for this labor, and clashing them together on a mountain above the lake produced a sudden clatter loud enough to startle the entire flock into flight at once.
Apollodorus, Library 2.5.6
What happened to the birds that survived?
According to Apollodorus and Apollonius of Rhodes, the surviving birds fled across the sea to Aretias, a deserted island in the Black Sea sacred to the war-god Ares. They did not stay gone for good: the Argonauts later encounter the same population on their own voyage and have to fend off a hail of sharp bronze feathers before they can land.
Apollonius of Rhodes, Argonautica 2.1030-1089
Were the Stymphalian Birds dangerous in ways beyond simply attacking people?
Later tradition credits them with bronze feathers sharp enough to be loosed like arrows or projectiles, a detail most vividly shown in the Argonauts' later encounter with the survivors, when the birds rain feathers down on the crew's ship and force the men to protect themselves with their shields rather than fight back directly.
Apollonius of Rhodes, Argonautica 2.1030-1089
How does this labor connect to the story of the Argonauts?
Heracles's sixth labor only drives the flock away from Arcadia rather than destroying it outright, and Apollodorus and Apollonius both place the survivors on the island of Aretias in the Black Sea. That detail resurfaces years later when Jason's crew, sailing the same waters on their own quest, has to deal with the very same birds themselves.
Apollodorus, Library 2.5.6
Later Traditions
Ancient sources are not fully consistent about how thoroughly Heracles dealt with the birds - some retellings treat the labor as a straightforward extermination, while Apollodorus's own version, in which a large surviving population flees intact to the Black Sea and reappears later in the Argonauts' story, makes clear that 'driven off' is closer to the truth than 'wiped out.' The bronze castanets Athena lent him are sometimes counted among the small number of divine tools, alongside his club, bow, and the lion skin, that recur across multiple labors rather than being invented fresh for each one.
Where Accounts Differ
- driven off vs. exterminated
- Extent of the kill: some retellings treat this labor as exterminating the birds outright, but Apollodorus's own account has a large surviving population flee intact to the Black Sea, where Apollonius of Rhodes later has the Argonauts encounter the same flock - evidence that 'driven off' fits the earliest sources better than 'wiped out.'
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Sources
- Apollodorus, Library 2.5.6
- Apollonius of Rhodes, Argonautica 2.1030-1089
- Timothy Gantz, Early Greek Myth (1993)