Belariath

So that I can assure I'm roleplaying my Mephos to be the appropriate size and weight at the appropriate times... what's the natural rate of their development? How long until they're fully grown? When can they be ridden? How long can they live?

most info should be here:

http://belariath.com/npcbeast.html

and here: viewtopic.php?f=45&t=5220

but i believe the info is identical