Quote:
Well all the dragons had wings except the father of the dragons....the worm of Morgoth Glaurung!
I think all the early dragons were flightless. I cannot find a passage in the Sil or UT to confirm this but both Foster's complete guide to ME and Tyler's Complete Tolkien companion agree with it.
From Tyler's CTC Quote:
The Great Worms were divided into three distinct breeds: the uruloki, fire-breathing beasts who were unable to fly (Glaurung was one of these): their evolved kindred who could both fly and breathe fire (Ancalagon and Smaug the Golden were of this type); and many lesser 'cold-drakes' whose power lay in speed and size alone.
From Foster's CGTME Quote:
The first of the uruloki, the fire-drakes of the North, was Glaurung. They breathed fire but did not fly; they were the most common type of dragon in the First Age.
These quotes can be validated by comparing two passages from the Silmarillion, the first from the fall of Gondolin in FA 511 and the second from the Great Battle some years later.
Quote:
and with them came the dragons of the brood of Glaurung, and they had become now many and terrible.
and then from the Great Battle a few years later
Quote:
...and out of the pits of Angband there issued the winged dragons, that had not before been seen; and so sudden and ruinous was the onset of that dreadful fleet that the host of the Valar was driven back....