Myth Library · Heroic Conflict

Heracles and the Sons Named Cycnus

3 source witnesses · 3 source-scoped variants · reviewed 2026-08-30

The Shield of Heracles and later mythography preserve related but nonidentical conflicts in which Heracles kills a son of Ares named Cycnus; the Shield continues with Ares' failed intervention and wound.

Canonical narrative

Cycnus meets Heracles in the hard brightness of armor. In the Shield of Heracles, Athena warns the hero and stands beside him. Heracles kills Cycnus, but the death does not end the violence. Ares comes for the man who has killed his son. The god drives forward even after Athena's warning, and Heracles wounds him. Phobos and Deimos lift their father from the field.

The scene turns lineage into battle consequence. Ares is not only violence personified. He is a father who enters danger because his child lies dead, then becomes another wounded body in the chain.

Pseudo-Apollodorus preserves two compact Cycnus notices in different parts of Heracles' career and different places. They may concern distinct sons of Ares who share a name. The variants remain separate because combining them would invent a smooth biography that no surviving witness supplies.

Naming is part of the difficulty. The poem gives one sustained combat, while the mythographer places two brief encounters at different points and locations. Keeping all three witnesses visible lets the reader see what is shared, a son of Ares killed by Heracles, and what cannot safely be made into one life.

Episodes in this myth

Episode 1

Heracles kills Cycnus

Heracles meets Cycnus in armor and kills him under Athena's warning and support.

Episode 2

Ares charges Heracles

Ares rushes to avenge his son even after Athena warns against the attack.

Episode 3

Ares is carried away

Heracles wounds Ares, and Phobos and Deimos carry their father from the field.

Participants and roles

Ares

father who intervenes after Cycnus is killed and is wounded by Heracles

His avenging charge and wound belong to the Shield; the two compact Pseudo-Apollodorus notices do not repeat the full intervention.

Heracles

killer of Cycnus and opponent who wounds Ares in the Shield

The Shield develops his combat with Cycnus and Ares, while later notices preserve shorter encounters at other points and places.

Cycnus or the sons named Cycnus

Ares-born antagonists kept as source-scoped figures rather than forced into one biography

The shared name does not prove one biography; each Cycnus remains attached to the witness and location that attest him.

Athena

protector and adviser who supports Heracles in the Shield

Her warning and support are features of the Shield's extended combat, not details supplied by every Cycnus notice.

Phobos

son of Ares who with Deimos carries the wounded god from battle

The Shield gives him the removal of his wounded father alongside Deimos; the role is not generalized beyond that poem.

Deimos

son of Ares who with Phobos carries the wounded god from battle

He shares the Shield's rescue action with Phobos after Heracles wounds Ares.

Source-scoped variants

The Shield's Cycnus

Cycnus confronts Heracles on the road; Athena supports Heracles, Cycnus dies, and Ares attacks until Heracles wounds him and Phobos and Deimos carry him away.

What differs: This extended poetic combat binds Ares directly to Cycnus' death and to the god's own bodily defeat.

Greek Archaic · Ancient Greece

The Cycnus near Pyrene

Pseudo-Apollodorus gives one encounter with a son of Ares named Cycnus in Heracles' labors.

What differs: Its location and compression differ from the Shield and should not be patched into the poem as missing detail.

Greek Roman Imperial · Ancient Greece

The Cycnus at Itonus

Pseudo-Apollodorus later records another son of Ares named Cycnus killed by Heracles at Itonus.

What differs: The second notice may concern a distinct figure with the same name, so it remains a separate variant rather than a duplicate event.

Greek Roman Imperial · Ancient Greece

Source witnesses

EXPLICIT PRIMARY · Reviewed

Shield of Heracles

Hesiod; edited and translated by Hugh G. Evelyn-White · 1914

Line 57-114; 327-337; 349-480

Poetic witness for the road encounter, Athena's warning, Cycnus' death, Ares' intervention, and his removal after being wounded.

Open reviewed source

EXPLICIT PRIMARY · Reviewed

Library

Pseudo-Apollodorus; edited and translated by James G. Frazer · 1921

Entry Library · Section 2.5.11

Later mythographic Cycnus episode located near the Echidorus and Pyrene.

Open reviewed source

EXPLICIT PRIMARY · Reviewed

Library

Pseudo-Apollodorus; edited and translated by James G. Frazer · 1921

Entry Library · Section 2.7.7

Separate later Cycnus notice at Itonus, preserved as a distinct source-scoped figure.

Open reviewed source