Categorys of dangerous Zoo Animals

[German Zoo World]

I know that Zoo Animals are counted in several Categorys from least dangerous to very dangerous. But which Species are counted in each Category and why?

 

[Batto]

Look for Anhang 2 of GUV-R 116/BGR 116 Regeln für Sicherheit und Gesundheitsschutz: Haltung von Wildtieren