Alduin vs Smaug - Battles - Comic Vine

Calculating the size of Glaurung : r/tolkienfans

Ask About Middle Earth — Glaurung vs. Smaug

Dragons in Middle-earth - Wikipedia

Smaug, Wiki

Death of Glaurung - Inger Edelfeldt

Smaug vs Ancalagon by Valonia-Feline on DeviantArt

Smaug (Tolkien Legendarium) vs Glaurung (Tolkien Legendarium) - Who would win in a fight? - Superhero Database

Smaug - Tolkien Gateway

Pin by Tammie Dodge on Art speaks to me

Isengard - Balrog vs Dragon: I have given that some thoughts. At the beginning I asumed that they would be quite equal, but I found a threat in a Tolkien forum where