Smaug vs Ancalagon by Valonia-Feline on DeviantArt

The only thing bigger than Ancalagon the black : r/Silmarillionmemes

Dragons of Middle-earth : r/tolkienfans

NO SPOILERS] Westeros's Drogon(short necked, younger and faithful) vs Middle Earth's Smaug(Long necked, badass, intelligent, without a master). Who would win? Personally, I prefer short necked dragons but Smaug might can easily

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Alduin vs Smaug - Battles - Comic Vine

Smaug, The One Wiki to Rule Them All

Death of Glaurung - Inger Edelfeldt

Stream Dragons of the Lord of the Rings Universe - Smaug, Glaurung, Ancalagon, Scatha Lore (Spoilers) by ThePhilosophersGames

Who would win? Smaug or danys dragon 10 years old : r/gameofthrones

Lord of the Rings: How Morgoth Created Dragons