You will get knocked off your griffin if you touch water! When I was flying I accidentally touched water and there just so happened to be a high level megalodon right below me and I think you can guess how that turned out.
Wanna get Wyvern eggs? Use one of these with a whip and you'll get so many eggs you'll end up with so many omelettes that you don't know what to do with them
While diving pull up at the last second above your target and use main left click attack. Does a ton more dmg then just landing on target. Gives a nice speed boost too.