casting spells while mounted on a flying creature

[johnsemlak]

I urgently need the rules for a wizard casting spells on a flying mount, a wyvern in this case.

I'm assuming the wizard will have ranks in ride and concentration.

Would the concentration DC be 10 (standard for a character on a mount) or higher? Would ranks in the Ride skill give a synergy bonus.

Are rules for casting while on a flying creature dealt with specifically anywhere?

 

[Gaius Agricola]

Well, the SRD has this to say:

Casting Spells while Mounted: You can cast a spell normally if your mount moves up to a normal move (its speed) either before or after you cast. If you have your mount move both before and after you cast a spell, then you’re casting the spell while the mount is moving, and you have to make a Concentration check due to the vigorous motion (DC 10 + spell level) or lose the spell. If the mount is running (quadruple speed), you can cast a spell when your mount has moved up to twice its speed, but your Concentration check is more difficult due to the violent motion (DC 15 + spell level).

So, no ride check, no ride synergy. Move before or after the casting, no concentration check. Move before AND after, concentration check, DC10+ spell level. Mount is running, DC15+ Spell level.