Saved by Naria?

[Inziladun]

Originally Posted by Mugwump

Remember, his body wasn't exactly human. He was one tough old bird!

From Gwaihir's comment about Gandalf being light enough to float to the earth after his return, I'd say you're right about Gandalf the White. But it's made plain that the bodies the Istari inhabited when they arrived in ME were nothing special.

For with the consent of Eru, [The Valar] sent members of their own high order, but clad in bodies as of Men, real and not feigned, but subject to the fears and pains and weariness of earth, able to hunger and thirst and be slain....

UT The Istari