What help does smaug's slayer receive in the accomplishment?

Smaug's slayer, Bard the Bowman, receives crucial assistance from the thrush, a bird that carries the message about Smaug's weak spot, located under his left breast. Additionally, Bard is supported by the people of Lake-town, who rally around him after the dragon's attack. This collective effort, combined with Bard's keen Archery skills and knowledge of the dragon's vulnerabilities, ultimately leads to Smaug's defeat.