A Worm with Wings?

[Maéglin]

In the Hobbit I think someone does call Smaug a 'worm' but that to me sounded like an insult rather. You know because Smaug has been lying there for ages, calling him a worm could be like calling him to be too fat to fly or something. [img]smilies/smile.gif[/img]

Glaurung was indeed not the only wingless Dragon. The Nirnaeth Arnoediad Chapter of the Silmarillion describes

Morgoth loosed his last strength, and Angband was emptied. There came wolves and wolfriders, and there came Balrogs, and dragons, and Glaurung father of dragons.

Ancalagon and his winged brood were first seen in the last battles of the War of Wrath when Morgoth knew that his defeat was nigh. They were just his secret weapons. Although it is strange. Didn't Morgoth believe and was so confident that he had utterly defeated all his foes on Middle Earth and that the Valar would not assail him, being content in their own realm. So why did he need the Winged Dragons? Just a side project for him when he was bored?