In J.R.R. Tolkien’s The Hobbit, Smaug the dragon is killed by Bard the Bowman. Bard, a descendant of Girion, the Lord of Dale, uses a black arrow to shoot Smaug in the one vulnerable spot on his body. This spot was revealed to Bard by a thrush, who had overheard Bilbo Baggins discussing it with the dwarves.
Bard’s precise shot hits Smaug in the left breast, where the dragon’s armor is missing a scale. This causes Smaug to fall from the sky and crash into Lake-town, leading to his death. Bard’s heroic act not only saves Lake-town from further destruction but also plays a crucial role in the eventual reclaiming of the Lonely Mountain by Thorin Oakenshield and his company of dwarves.