When Ignitus asked what had become of Spyro, he responded by saying that the young dragon's name wasn't in the book of dead dragons, hinting that Spyro is still alive.

They are very intelligent, more so than most humans, extremely powerful, breathtakingly beautiful, and have lifespans which can stretch up to 4,200 years (as stated in draconomicon, the book of dragons).

"That the White Sacrifice is set forth in their own-I mean, our own-sacred book of dragons."

The complete book of dragons.