8th Ed. Terradon charging

Do terradons, and by extension all fliers, charge on their normal movement or flying movement?

Had a dispute about it today but nobody was able to site any rules to resolve it.

Thanks in advance

 

Crack open the rulebook and find the "Fly" universal special rule.
Then look at the "Flying Charge" subrule.

 

Aha, thank you. We were looking under charge pages XD