Dragons were great and evil beings of Middle-Earth. They were fire-breathing. They were also quite greedy. In the First Age, Dragons backed Morgoth until the end of the War of Wrath, when the War was lost and Morgoth was defeated. The Dragon Smaug took over the Lonely Mountain in 2770 of the Third Age. Dwarves returned in 2941 and he was slain by Bard the Bowman of Dale. By this time, dragons may have been extinct in Middle-Earth. Though there was a species of cold-drake living in Forodwaith, which may have still thrived at this time.