The thrush told Bard the Bowman of Smaug's one weak spot, a bare patch on the dragon's belly. With his last arrow, Bard killed Smaug by shooting into this place.
Tolkien faithfully continued the time-honored tradition of ancient European myth and legend in assigning his nearly invulnerable dragons with a single weak spot: “the underbelly.”
Smaug's 'weak spot' is not a missing scale, but rather a section of his natural underbelly that is not covered by any gems like the rest. Bard kills smaug with one lucky shot of a regular arrow using a regular bow to this area.
Smaug is Not The Strongest Dragon
Undeniably, Smaug is the Greatest Dragon left in Middle Earth during the Third Age. Yet, he is not the strongest in its history. That title falls to Ancalagon the Black, the largest dragon ever to have existed in Middle-earth.
Look for the hollow of the left breast as he turns and flies above you.” Only then is Bard able to see the weak point and utilize it, bringing the dragon down once and for all as if falls out of the sky and crashes down on the houses below.
Towards the end of An Unexpected Journey, a thrush appears to the Dwarves and it is considered as a sign of hope. The bird flies to the Lonely Mountain and breaks an nut, which wakes Smaug.
In the conversation between Smaug and Bilbo, Bilbo calls him "Smaug the Tremendous", "Smaug the Chiefest and Greatest of Calamities", "Smaug the Mighty", "Smaug the Unassessably Wealthy", "Lord Smaug the Impenetrable" and "Your Magnificence", and later Bilbo refers to him as "Smaug the Terrible" and "Smaug the Dreadful ...
Smaug's dragon-fine would not have been hot enough to destroy the One Ring. The malevolence that Sauron put inside of the Ring could only be destroyed in the Cracks of Doom, so Frodo was compelled to make the journey to Mordor.
So, one glimpse into Smaug's eyes and the Balrog falls under the spell. Even if it's just for a second—a moment of hesitation or distraction, it'd be enough. Smaug would snatch up Durin's Bane and gobble him up with his sword-sharp teeth (and we know swords can kill Balrogs). There you have it.
Getting the necessary lift from wings requires air-speed and a back-of-the-envelope calculation shows that air-speed scales as the square-root of body-size. A few more scribbles and comparisons with real flying creatures and out pops the air-speed required by Smaug to fly – 200kph.
Smaug asks Bilbo's name. Bilbo doesn't want to give Smaug his name for fear of evil spells, but he also doesn't want to refuse Smaug's request for fear of angering the dragon (neither would we). So Bilbo calls himself a number of fancy names – "Barrel-rider" being the primary one.
Smaug was considered to be the last "great" dragon of Middle-earth. Sauron allied with Smaug and intended to use the dragon's powers against the people of Middle-earth. But before that could happen, Smaug was slain by Bard the Bowman.
He decides to go back down to Smaug and see if he can find his weak spot. Bilbo is invisible because he is wearing his ring, but Smaug can smell him.
Yet, with Smaug being a dragon, he may have shared the same traits as real-world reptiles -- most notably, their ability to go long periods without eating. Many reptiles have a form of hibernation called brumation, where they'll slow down to conserve energy over winter and not require any food.
Smaug was the last great fire-drake, but not the last of all. After his death, others of like kind apparently still survived in the world, but none came close to Smaug in power.
Smaug can also be ruthless and cruel, as he destroyed the entire kingdom of Erebor to seize its treasure, and destroyed the entire village of Lake-town to hurt Thorin's Company.
God is the most powerful entity in Tolkien's Lord of the Rings universe. The Elvish name for him is actually Eru Ilúvatar, meaning “the one, father of all.” So the question becomes: Who is the second-most powerful being? Originally, it was Melkor, “he who arises in might,” the most powerful of the Ainur (or angels).
Drogon Daenerys Targaryen's mount from Game of Thrones, ended up being 50 meters long, plus or minus 10. Smaug from The Hobbit is a staggering 140 meters long, give or take 15.
Gandalf absolutely could have killed Smaug in a one-on-one fight. The grey wizard fought and defeated the Balrog of Moria, and a dragon was a lesser evil than that. As proof, Morgoth -- the original Dark Lord of Middle-earth -- created and bred dragons to his evil purpose in the First Age.
In an attempt to defeat Smaug, the dwarves try to drown him in liquid gold. Yup, that's right. Apparently, there was a whole bunch of gold just waiting to be melted down and then poured into a GIANT cast of a dwarf statue.
It wouldn't be easy–the most common descriptor of a dragon is “fire-breathing,” after all. But unlike other aspects of the book and now the film that are wholly magic, Smaug's burning breath is actually one of the least magical, and can be wrangled into plausibility.
Smaug Lost Two Legs
The idea was to get the fear through his bulk. In fact, if you go back and look at the first film and the scenes that he was in, he was actually a four-legged dragon because we just had him stomping through Erebor in all of those flashback scenes," Letteri said.
Smaug doesn't say very much when the dwarves are trying to apprehend him in the second film either. The only times he ever seems to address anyone in those scenes is when Bilbo is present. He says a great deal to Bard the Bowman while attacking Lake-town, which Mr.
Smaug calls Bilbo a thief, and he is accurate in his judgment.