How did Smaug die in The Hobbit?

In The Hobbit: The Battle of the Five Armies, Smaug attacks Lake-town. He is killed by Bard with a black arrow and his body falls on the boat carrying the fleeing Master of Lake-town.

Who kills Smaug the dragon?

Bard the Bowman is a character in J. R. R. Tolkien’s The Hobbit. A Man of Laketown and a descendant of the ancient Lords of Dale, Bard manages to kill Smaug, the dragon, after which he becomes king of Dale.