The last time I bumped into a legendary dragon the fight lasted for a day and a half, the scaly bugger would land take a couple shots at me, take off and circle. This repeated for a day and a half, 30-35 cross bow bolts, 10-15 health potions,5-6 resist fire potions, and a whole bunch of blocking / swinging the [censored] dragon finally landed long enough for me to knock it's health down and finish it off with a kill cam.
So ancient dragon : fights last about 10 minutes( in game )..... Legendary dragon : fight lasted 1.5 days, was a pretty epic battle!!! Nice for a change, at Lv. 81 Gorgun was wondering when a challenge would arise

Looks like I'll need to build some armor and jewelry that gives special protection against fire and frost so I'm prepped for the Revered and Legendary geckos.

Their breath does seem to be more savage then the average dragon, the drain vitality shout is what really puts a dent in you. If they land the drain vitality shout ( which is constantly draining your H/S/M ) then catch you with fire or frost it's pretty much game over, they seem to hit harder ( tail,bite,wing ) then the ancient dragons as well. I'm wondering what effect the " deadlier dragons " mod will have on the revered and legendary dragons.

There's a shout for helping you deal with those flying gecko's that won't come down to ground for a fair fight

Yeah but IMO that shout is as cheap as the dragon flying away. I like the natural feeling of a dragonrend free fight , I have tried it though and it seems that it doesn't last as long on a legendary dragon as a normal dragon.

im a PS3 user and ive encountered 3 Dragons at the same time two ancient and one frost , they were very hard to take down as a group

Guys I saw a legendary dragon. It was up in the sky, i noticed the curled horns, heard it roar, and instantly hid. But i never forgot were it was so that i can go back to it